Chemical names · alphabetical database

Chemicals Starting with R

Find chemicals whose preferred name or source synonym starts with R. Browse the full list, check CAS numbers and formulas, or search within all 32,570 matching records.

Browse the database ↓ · Coverage and naming rules

32,570Matching chemical records

3,801With CAS cross-references

7,886ChEBI team annotated

Examples of chemicals starting with R

R74-79-3 · C6H14N4O2

R 83799011-02-6 · C14H16N4

R-17074-84-0 · C2H6

R-600106-97-8 · C4H10

R-601109-66-0 · C5H12

R-61060-29-7 · C4H10O

Interactive filtering requires JavaScript. The complete alphabetical list is available through the page links and downloads.

32,570 records · showing 1–100

Chemicals starting with R, page 1
Chemical & matching names	CAS number	Formula & mass	Annotation
RSource synonym · CHEBI:16467 Names & database links Source preferred name: L-arginine Matching names: R ChEBI record · PubChem search · CAS lookup	74-79-3	C6H14N4O2174.204 g/mol	3-starChEBI team
RSource synonym · CHEBI:29952 Names & database links Source preferred name: L-arginine residue Matching names: R ChEBI record	Not supplied	C6H12N4O156.189 g/mol	3-starChEBI team
(18R )-18-O-1-b-xylopyranosyl-(1-6)-b-D-glucopyranosidePreferred name · CHEBI:202073 Names & database links Source preferred name: (18R )-18-O-1-b-xylopyranosyl-(1-6)-b-D-glucopyranoside Matching names: (18R )-18-O-1-b-xylopyranosyl-(1-6)-b-D-glucopyranoside ChEBI record	Not supplied	C32H54O14662.77 g/mol	2-starThird-party annotation
(18R )-18-O-a-L-Rhamnopyranosyl-(1-6)-b-D-glucopyranosideof murolic acidPreferred name · CHEBI:210003 Names & database links Source preferred name: (18R )-18-O-a-L-Rhamnopyranosyl-(1-6)-b-D-glucopyranosideof murolic acid Matching names: (18R )-18-O-a-L-Rhamnopyranosyl-(1-6)-b-D-glucopyranosideof murolic acid ChEBI record	Not supplied	C33H56O14676.797 g/mol	2-starThird-party annotation
(18R )-18-O-b-D-Glucopyranoside of murolic acidPreferred name · CHEBI:205794 Names & database links Source preferred name: (18R )-18-O-b-D-Glucopyranoside of murolic acid Matching names: (18R )-18-O-b-D-Glucopyranoside of murolic acid; (2R,3S)-4-methylidene-5-oxo-2-[(14R)-14-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxypentadecyl]oxolane-3-carboxylic acid ChEBI record	Not supplied	C27H46O10530.655 g/mol	2-starThird-party annotation
R 12654Source synonym · CHEBI:6433 Names & database links Source preferred name: Levamisole hydrochloride Matching names: R 12,564; R 12654; R-12564 ChEBI record · PubChem search · CAS lookup	16595-80-5	C11H12N2S.HCl240.759 g/mol	2-starThird-party annotation
R 1303Source synonym · CHEBI:82107 Names & database links Source preferred name: Carbophenothion Matching names: R 1303; R-1303 ChEBI record · PubChem search · CAS lookup	786-19-6	C11H16ClO2PS3342.875 g/mol	2-starThird-party annotation
R 1406Source synonym · CHEBI:135550 Names & database links Source preferred name: phenoperidine Matching names: R 1406; R-1406 ChEBI record · PubChem search · CAS lookup	562-26-5	C23H29NO3367.489 g/mol	2-starThird-party annotation
R 152450Source synonym · CHEBI:81923 Names & database links Source preferred name: flutriafol Matching names: (RS)-2,4'-difluoro-alpha-(1H-1,2,4-triazol-1-ylmethyl)benzhydryl alcohol; R 152450; rac flutriafol; rac-(1R)-1-(2-fluorophenyl)-1-(4-fluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethan-1-ol; rac-1-(2-fluorophenyl)-1-(4-fluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanol ChEBI record · PubChem search · CAS lookup	76674-21-0	C16H13F2N3O301.291 g/mol	3-starChEBI team
R 1658Source synonym · CHEBI:135500 Names & database links Source preferred name: moperone Matching names: R 1658 ChEBI record · PubChem search · CAS lookup	1050-79-9	C22H26FNO2355.453 g/mol	2-starThird-party annotation
R 17899Source synonym · CHEBI:77095 Names & database links Source preferred name: flubendazole Matching names: R 17,889; R 17899 ChEBI record · PubChem search · CAS lookup	31430-15-6	C16H12FN3O3313.288 g/mol	3-starChEBI team
R 17934Source synonym · CHEBI:34892 Names & database links Source preferred name: nocodazole Matching names: R 17934; R-17934; R17,934 ChEBI record · PubChem search · CAS lookup	31430-18-9	C14H11N3O3S301.327 g/mol	3-starChEBI team
R 2028Source synonym · CHEBI:177744 Names & database links Source preferred name: fluanisone Matching names: R 2028; R 2167; R-2028; R-2167 ChEBI record · PubChem search · CAS lookup	1480-19-9	C21H25FN2O2356.441 g/mol	2-starThird-party annotation
R 20XSource synonym · CHEBI:31056 Names & database links Source preferred name: 13-deoxycarminomycin Matching names: R 20X ChEBI record · PubChem search · CAS lookup	76034-18-9	C26H29NO9499.516 g/mol	3-starChEBI team
R 2323Source synonym · CHEBI:89642 Names & database links Source preferred name: Gestrinone Matching names: R 2323; R-2323; RU 2323; RU-2323 ChEBI record · PubChem search · CAS lookup	16320-04-0	C21H24O2308.421 g/mol	2-starThird-party annotation
R 23979Source synonym · CHEBI:81927 Names & database links Source preferred name: enilconazole Matching names: (RS)-enilconazole; R 23,979; R 23979; rac-1-[2-(allyloxy)-2-(2,4-dichlorophenyl)ethyl]-1H-imidazole; rac-enilconazole; racemic enilconazole ChEBI record · PubChem search · CAS lookup	35554-44-0	C14H14Cl2N2O297.18 g/mol	3-starChEBI team
R 2453Source synonym · CHEBI:135339 Names & database links Source preferred name: demegestone Matching names: R 2453; R-2453 ChEBI record · PubChem search · CAS lookup	10116-22-0	C21H28O2312.453 g/mol	2-starThird-party annotation
R 2858Source synonym · CHEBI:34857 Names & database links Source preferred name: Moxestrol Matching names: R 2858; R-2858; RU 16117; RU-16117 ChEBI record · PubChem search · CAS lookup	34816-55-2	C21H26O3326.436 g/mol	2-starThird-party annotation
R 2962Source synonym · CHEBI:748551 Names & database links Source preferred name: amiperone Matching names: R 2962; R-2962 ChEBI record	Not supplied	C24H28ClFN2O2430.951 g/mol	2-starThird-party annotation
R 31520Source synonym · CHEBI:77053 Names & database links Source preferred name: closantel Matching names: R 31,520; R 31520; rac-N-{5-chloro-4-[(4-chlorophenyl)(cyano)methyl]-2-methylphenyl}-2-hydroxy-3,5-diiodobenzamide ChEBI record · PubChem search · CAS lookup	57808-65-8	Not suppliedMass not supplied	3-starChEBI team
R 3248Source synonym · CHEBI:748554 Names & database links Source preferred name: aceperone Matching names: R 3248; R-3248 ChEBI record	Not supplied	C24H29FN2O2396.506 g/mol	2-starThird-party annotation
R 3345Source synonym · CHEBI:78549 Names & database links Source preferred name: pipamperone Matching names: R 3345; R-3345 ChEBI record · PubChem search · CAS lookup	1893-33-0	C21H30FN3O2375.488 g/mol	3-starChEBI team
R 3365Source synonym · CHEBI:135699 Names & database links Source preferred name: piritramide Matching names: R 3365; R-3365 ChEBI record · PubChem search · CAS lookup	302-41-0	C27H34N4O430.596 g/mol	2-starThird-party annotation
R 33800Source synonym · CHEBI:9317 Names & database links Source preferred name: Sufentanil citrate Matching names: R 33800; R-33800 ChEBI record · PubChem search · CAS lookup	60561-17-3	C22H30N2O2S.C6H8O7578.684 g/mol	2-starThird-party annotation
R 35443Source synonym · CHEBI:31943 Names & database links Source preferred name: oxatomide Matching names: R 35 443; R 35,443; R 35443 ChEBI record · PubChem search · CAS lookup	60607-34-3	C27H30N4O426.564 g/mol	3-starChEBI team
R 39209Source synonym · CHEBI:749268 Names & database links Source preferred name: alfentanil hydrochloride Matching names: R 39,209; R 39209; R-39,209; R-39209; Rapifen conc; Rapifen dilute; Rapifen intensive care ChEBI record	Not supplied	HCl.C21H32N6O3452.987 g/mol	2-starThird-party annotation
R 3959Source synonym · CHEBI:135512 Names & database links Source preferred name: clometacin Matching names: R 3959; R-3959 ChEBI record · PubChem search · CAS lookup	25803-14-9	C19H16ClNO4357.793 g/mol	2-starThird-party annotation
R 400Source synonym · CHEBI:7934 Names & database links Source preferred name: paromomycin Matching names: (1R,2R,3S,4R,6S)-4,6-diamino-2-{[3-O-(2,6-diamino-2,6-dideoxy-beta-L-idopyranosyl)-beta-D-ribofuranosyl]oxy}-3-hydroxycyclohexyl 2-amino-2-deoxy-alpha-D-glucopyranoside; R 400; R-400 ChEBI record · PubChem search · CAS lookup	7542-37-2	C23H45N5O14615.634 g/mol	3-starChEBI team
R 4082Source synonym · CHEBI:752482 Names & database links Source preferred name: propyperone Matching names: R 4082; R-4082 ChEBI record	Not supplied	C23H33FN2O2388.527 g/mol	2-starThird-party annotation
R 4318Source synonym · CHEBI:31612 Names & database links Source preferred name: Floctafenine Matching names: R 4318; R-4138; R-4318; RU 15750; RU-15750 ChEBI record · PubChem search · CAS lookup	23779-99-9	C20H17F3N2O4406.36 g/mol	2-starThird-party annotation
R 4444Source synonym · CHEBI:751963 Names & database links Source preferred name: duometacin Matching names: R 4444; R-4444 ChEBI record	Not supplied	C20H19NO5353.374 g/mol	2-starThird-party annotation
R 46846Source synonym · CHEBI:83928 Names & database links Source preferred name: tubulozole Matching names: R 46846; rac-ethyl [4-({[(2R,4R)-2-(2,4-dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl}sulfanyl)phenyl]carbamate; rac-ethyl [4-({[(2S,4S)-2-(2,4-dichlorophenyl)-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl}sulfanyl)phenyl]carbamate ChEBI record · PubChem search · CAS lookup	84697-22-3	Not suppliedMass not supplied	3-starChEBI team
R 4714Source synonym · CHEBI:750404 Names & database links Source preferred name: oxiperomide Matching names: R 4714; R-4714 ChEBI record	Not supplied	C20H23N3O2337.423 g/mol	2-starThird-party annotation
R 48Source synonym · CHEBI:80497 Names & database links Source preferred name: Chlornaphazine Matching names: R 48; R-48 ChEBI record · PubChem search · CAS lookup	494-03-1	C14H15Cl2N268.187 g/mol	2-starThird-party annotation
R 4845Source synonym · CHEBI:135794 Names & database links Source preferred name: bezitramide Matching names: R 4845; R-4845 ChEBI record · PubChem search · CAS lookup	15301-48-1	C31H32N4O2492.623 g/mol	2-starThird-party annotation
R 49945Source synonym · CHEBI:183637 Names & database links Source preferred name: ketanserin tartrate Matching names: (2R,3R)-2,3-dihydroxybutanedioic acid - 3-{2-[4-(4-fluorobenzoyl)piperidin-1-yl]ethyl}quinazoline-2,4(1H,3H)-dione; R 49945; R41468 tartrate ChEBI record · PubChem search · CAS lookup	83846-83-7	C22H22FN3O3.C4H6O6545.52 g/mol	3-starChEBI team
R 5020Source synonym · CHEBI:73390 Names & database links Source preferred name: promegestone Matching names: R 5020; RU5020 ChEBI record · PubChem search · CAS lookup	34184-77-5	C22H30O2326.48 g/mol	3-starChEBI team
R 5046Source synonym · CHEBI:177553 Names & database links Source preferred name: Cinperene Matching names: R 5046; R-5046 ChEBI record · PubChem search · CAS lookup	14796-24-8	C25H28N2O2388.511 g/mol	2-starThird-party annotation
R 50970Source synonym · CHEBI:751085 Names & database links Source preferred name: metrenperone Matching names: R 50 970; R 50970; R-50 970; R-50970 ChEBI record	Not supplied	C24H26FN3O2407.489 g/mol	2-starThird-party annotation
R 51 163Source synonym · CHEBI:751033 Names & database links Source preferred name: tameridone Matching names: R 51 163; R-51 163 ChEBI record	Not supplied	C22H26N6O2406.49 g/mol	2-starThird-party annotation
R 57959Source synonym · CHEBI:751686 Names & database links Source preferred name: barmastine Matching names: R 57959; R-57959 ChEBI record	Not supplied	C27H29N7O2483.576 g/mol	2-starThird-party annotation
R 58735Source synonym · CHEBI:177731 Names & database links Source preferred name: Sabeluzole Matching names: R 58735; R-58735 ChEBI record · PubChem search · CAS lookup	104383-17-7	C22H26FN3O2S415.534 g/mol	2-starThird-party annotation
R 6109Source synonym · CHEBI:751463 Names & database links Source preferred name: spirilene Matching names: R 6109; R-6109 ChEBI record	Not supplied	C24H28FN3O393.506 g/mol	2-starThird-party annotation
R 6218Source synonym · CHEBI:93369 Names & database links Source preferred name: 8-[4,4-bis(4-fluorophenyl)butyl]-1-phenyl-1,3,8-triazaspiro[4.5]decan-4-one Matching names: R 6218; R-6218; redeptin ChEBI record · PubChem search · CAS lookup	1841-19-6	C29H31F2N3O475.583 g/mol	2-starThird-party annotation
R 62818Source synonym · CHEBI:752208 Names & database links Source preferred name: lorcinadol Matching names: R 62 818; R 62818; R-62-818 ChEBI record	Not supplied	C17H19ClN4314.82 g/mol	2-starThird-party annotation
R 64947Source synonym · CHEBI:750999 Names & database links Source preferred name: noberastine Matching names: R 64947; R-64947 ChEBI record	Not supplied	C17H21N5O311.389 g/mol	2-starThird-party annotation
R 67408Source synonym · CHEBI:135254 Names & database links Source preferred name: fenclofenac Matching names: R 67408; R-67408; RX 67408; RX-67408 ChEBI record · PubChem search · CAS lookup	34645-84-6	C14H10Cl2O3297.137 g/mol	2-starThird-party annotation
R 67555Source synonym · CHEBI:132912 Names & database links Source preferred name: nebivolol hydrochloride Matching names: (1RS,1'RS)-1,1'-((2RS,2'SR)-bis(6-fluoro-3,4-dihydro-2H-1-benzopyran-2-yl))-2,2'-iminodiethanol hydrochloride; R 67555; R-67555; rac-(1R)-1-[(2S)-6-fluoro-3,4-dihydro-2H-1-benzopyran-2-yl]-2-({(2R)-2-[(2R)-6-fluoro-3,4-dihydro-2H-1-benzopyran-2-yl]-2-hydroxyethyl}amino)ethan-1-ol hydrochloride ChEBI record · PubChem search · CAS lookup	152520-56-4	Not suppliedMass not supplied	3-starChEBI team
R 694Source synonym · CHEBI:135848 Names & database links Source preferred name: methoserpidine Matching names: R 694; R-694; Resertene ChEBI record · PubChem search · CAS lookup	865-04-3	C33H40N2O9608.688 g/mol	2-starThird-party annotation
R 717 (ammonia)Source synonym · CHEBI:749163 Names & database links Source preferred name: ammonia solution, strong Matching names: R 717 (ammonia); Refrigerent r717 ChEBI record	Not supplied	H3N17.031 g/mol	2-starThird-party annotation
R 72063Source synonym · CHEBI:749798 Names & database links Source preferred name: loreclezole Matching names: R 72063; R-72063 ChEBI record	Not supplied	C10H6Cl3N3274.538 g/mol	2-starThird-party annotation
R 7242Source synonym · CHEBI:756264 Names & database links Source preferred name: difluanine hydrochloride Matching names: R 7242; R-7242 ChEBI record	Not supplied	HCl.C28H33F2N3.HCl.HCl558.972 g/mol	2-starThird-party annotation
R 76477Source synonym · CHEBI:82978 Names & database links Source preferred name: paliperidone Matching names: (RS)-paliperidone; R 76477; R-76477; rac-3-{2-[4-(6-fluoro-1,2-benzoxazol-3-yl)piperidin-1-yl]ethyl}-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one; rac-paliperidone; racemic paliperidone; Ro-76477; RO76477 ChEBI record · PubChem search · CAS lookup	144598-75-4	C23H27FN4O3426.484 g/mol	3-starChEBI team
R 7904Source synonym · CHEBI:93095 Names & database links Source preferred name: 2-[4-[4,4-bis(4-fluorophenyl)butyl]-1-piperazinyl]-N-(2,6-dimethylphenyl)acetamide Matching names: R 7904; R-7904 ChEBI record · PubChem search · CAS lookup	3416-26-0	C30H35F2N3O491.626 g/mol	2-starThird-party annotation
R 79598Source synonym · CHEBI:188525 Names & database links Source preferred name: Ocaperidone Matching names: R 79598; R-79598 ChEBI record · PubChem search · CAS lookup	129029-23-8	C24H25FN4O2420.488 g/mol	2-starThird-party annotation
R 818Source synonym · CHEBI:5091 Names & database links Source preferred name: flecainide acetate Matching names: R 818; R-818 ChEBI record · PubChem search · CAS lookup	54143-56-5	C17H20F6N2O3.C2H4O2474.398 g/mol	3-starChEBI team
R 8284Source synonym · CHEBI:229921 Names & database links Source preferred name: proclonol Matching names: R 8284; R-8284 ChEBI record	Not supplied	C16H14Cl2O293.193 g/mol	2-starThird-party annotation
R 8299Source synonym · CHEBI:9496 Names & database links Source preferred name: Tetramisole hydrochloride Matching names: R 8299 ChEBI record · PubChem search · CAS lookup	5086-74-8	C11H12N2S.HCl240.759 g/mol	2-starThird-party annotation
R 837Source synonym · CHEBI:36704 Names & database links Source preferred name: imiquimod Matching names: R 837 ChEBI record · PubChem search · CAS lookup	99011-02-6	C14H16N4240.31 g/mol	3-starChEBI team
R 875Source synonym · CHEBI:74274 Names & database links Source preferred name: dextromoramide Matching names: R 875 ChEBI record · PubChem search · CAS lookup	357-56-2	C25H32N2O2392.543 g/mol	3-starChEBI team
R 9298Source synonym · CHEBI:752529 Names & database links Source preferred name: seperidol hydrochloride Matching names: R 9298; R-9298 ChEBI record	Not supplied	HCl.C22H22ClF4NO2480.329 g/mol	2-starThird-party annotation
R&S-218MSource synonym · CHEBI:756070 Names & database links Source preferred name: alletorphine Matching names: R&S 218-M; R&S-218-M; R&S-218M ChEBI record	Not supplied	C27H35NO4437.58 g/mol	2-starThird-party annotation
R&S-5205MSource synonym · CHEBI:756674 Names & database links Source preferred name: homprenorphine Matching names: R&S 5205-M; R&S-5205-M; R&S-5205M ChEBI record	Not supplied	C28H37NO4451.607 g/mol	2-starThird-party annotation
R'-alpha-Neu5Ac-(2->3)-[beta-D-Gal-(1->3)-beta-D-GalNAc-(1->4)]-beta-D-Gal-(1->4)-R"Source synonym · CHEBI:142514 Names & database links Source preferred name: ->8)-alpha-Neu5Ac-(2->3)-[beta-D-Gal-(1->3)-beta-D-GalNAc-(1->4)]-beta-D-Gal-(1->4)-yl group Matching names: R'-alpha-Neu5Ac-(2->3)-[beta-D-Gal-(1->3)-beta-D-GalNAc-(1->4)]-beta-D-Gal-(1->4)-R" ChEBI record	Not supplied	C31H50N2O22802.733 g/mol	3-starChEBI team
R'-S-S-R'Source synonym · CHEBI:79973 Names & database links Source preferred name: Oxidized thiol-containing reductant Matching names: R'-S-S-R' ChEBI record	Not supplied	S264.13 g/mol	2-starThird-party annotation
R'-SHSource synonym · CHEBI:80696 Names & database links Source preferred name: Thiol-containing reductant Matching names: R'-SH ChEBI record	Not supplied	HS33.073 g/mol	2-starThird-party annotation
R'C(R)S-S(R)CR'Preferred name · CHEBI:17412 Names & database links Source preferred name: R'C(R)S-S(R)CR' Matching names: R'C(R)S-S(R)CR' ChEBI record	Not supplied	C2H2S2R490.17 g/mol	3-starChEBI team
R'C(R)SHPreferred name · CHEBI:16520 Names & database links Source preferred name: R'C(R)SH Matching names: R'C(R)SH ChEBI record	Not supplied	CH2SR246.093 g/mol	3-starChEBI team
R(+)-2-(heptan-3-yl)quinazolin-4(3H)-onePreferred name · CHEBI:203947 Names & database links Source preferred name: R(+)-2-(heptan-3-yl)quinazolin-4(3H)-one Matching names: R(+)-2-(heptan-3-yl)quinazolin-4(3H)-one; 2-[(3R)-heptan-3-yl]-3H-quinazolin-4-one ChEBI record	Not supplied	C15H20N2O244.338 g/mol	2-starThird-party annotation
R(+)-SKF-81297 hydrobromideSource synonym · CHEBI:231665 Names & database links Source preferred name: SKF-81297 Matching names: R(+)-SKF-81297 hydrobromide; R-(+)-6-Chloro-7,8-dihydroxy-1-phenyl-2,3,4,5-tetrahydro-1H-3-benzazepine hydrobromide ChEBI record · PubChem search · CAS lookup	253446-15-0	C16H16ClNO2.HBr370.674 g/mol	2-starThird-party annotation
r(+)xk469Preferred name · CHEBI:750003 Names & database links Source preferred name: r(+)xk469 Matching names: r(+)xk469; R(+)xk469 ChEBI record	Not supplied	C17H13ClN2O4344.754 g/mol	2-starThird-party annotation
R(-)-PhenylephrineSource synonym · CHEBI:8093 Names & database links Source preferred name: phenylephrine Matching names: 3-[(1R)-1-hydroxy-2-(methylamino)ethyl]phenol; R(-)-Phenylephrine ChEBI record · PubChem search · CAS lookup	59-42-7	C9H13NO2167.208 g/mol	3-starChEBI team
12R(13R)-epoxy-11S-hydroxy-9(Z)-octadecenoate(1-)Preferred name · CHEBI:194412 Names & database links Source preferred name: 12R(13R)-epoxy-11S-hydroxy-9(Z)-octadecenoate(1-) Matching names: 12R(13R)-epoxy-11S-hydroxy-9(Z)-octadecenoate(1-); (12R,13R)-epoxy-(11S)-hydroxy-(9Z)-octadecenoate ChEBI record	Not supplied	C18H31O4311.442 g/mol	2-starThird-party annotation
12R(13S)-epoxy-10R-hydroperoxy-(8E)-octadecenoate(1-)Preferred name · CHEBI:194417 Names & database links Source preferred name: 12R(13S)-epoxy-10R-hydroperoxy-(8E)-octadecenoate(1-) Matching names: 12R(13S)-epoxy-10R-hydroperoxy-(8E)-octadecenoate(1-); (12R,13S)-epoxy-(10R)-hydroperoxy-(8E)-octadecenoate; 12R,13S-epoxy-10R-hydroperoxy-(8E)-octadec-8-enoate(1-) ChEBI record	Not supplied	C18H31O5327.441 g/mol	2-starThird-party annotation
[R(Z)]-5-(2,3-dimethyltricyclo[2.2.1.0(2,6)]hept-3-yl)-2-methyl-2-penten-1-olSource synonym · CHEBI:10330 Names & database links Source preferred name: alpha-santalol Matching names: [R(Z)]-5-(2,3-dimethyltricyclo[2.2.1.0(2,6)]hept-3-yl)-2-methyl-2-penten-1-ol ChEBI record · PubChem search · CAS lookup	115-71-9	C15H24O220.356 g/mol	3-starChEBI team
(2R) - 2- pentylbutanedioateSource synonym · CHEBI:88404 Names & database links Source preferred name: Nonate Matching names: (2R) - 2- pentylbutanedioate; (2R) - 2- pentylbutanedioic acid; (2R) - 2- pentylsuccinic acid ChEBI record	Not supplied	C9H16O4188.223 g/mol	2-starThird-party annotation
(5R) 5-hydroxy-3-[(methoxycarbonyl)amino]-5-vinyl-2-cyclopenten-1-onePreferred name · CHEBI:220431 Names & database links Source preferred name: (5R) 5-hydroxy-3-[(methoxycarbonyl)amino]-5-vinyl-2-cyclopenten-1-one Matching names: (5R) 5-hydroxy-3-[(methoxycarbonyl)amino]-5-vinyl-2-cyclopenten-1-one ChEBI record	Not supplied	C9H11NO4197.19 g/mol	2-starThird-party annotation
(5R) 5-hydroxy-3-[[2-(4-hydroxyphenyl)ethyl]amino]-5-vinyl-2-cyclopenten-1-onePreferred name · CHEBI:222098 Names & database links Source preferred name: (5R) 5-hydroxy-3-[[2-(4-hydroxyphenyl)ethyl]amino]-5-vinyl-2-cyclopenten-1-one Matching names: (5R) 5-hydroxy-3-[[2-(4-hydroxyphenyl)ethyl]amino]-5-vinyl-2-cyclopenten-1-one; (5R)-5-ethenyl-5-hydroxy-3-[2-(4-hydroxyphenyl)ethylamino]cyclopent-2-en-1-one ChEBI record	Not supplied	C15H17NO3259.305 g/mol	2-starThird-party annotation
(5R) 5-hydroxylasiodiplodinPreferred name · CHEBI:201317 Names & database links Source preferred name: (5R) 5-hydroxylasiodiplodin Matching names: (5R) 5-hydroxylasiodiplodin ChEBI record	Not supplied	C17H24O5308.374 g/mol	2-starThird-party annotation
(R)(-)-DOI hydrochlorideSource synonym · CHEBI:232834 Names & database links Source preferred name: (-)-2,5-dimethoxy-4-iodoamphetamine hydrochloride Matching names: (R)(-)-DOI hydrochloride ChEBI record · PubChem search · CAS lookup	82864-02-6	C11H16INO2.HCl357.619 g/mol	2-starThird-party annotation
(1R),(3Z),(9S)-4,11,11-Trimethyl-8-methylenebicyclo[7.2.0]undec-3-eneSource synonym · CHEBI:88638 Names & database links Source preferred name: Humulen-(v1) Matching names: (1R),(3Z),(9S)-4,11,11-Trimethyl-8-methylenebicyclo[7.2.0]undec-3-ene ChEBI record	Not supplied	C15H24204.357 g/mol	2-starThird-party annotation
(3R),(4S)-4-hydroxylasiodiplodinPreferred name · CHEBI:200526 Names & database links Source preferred name: (3R),(4S)-4-hydroxylasiodiplodin Matching names: (3R),(4S)-4-hydroxylasiodiplodin; (4R,5S)-5,14-dihydroxy-16-methoxy-4-methyl-3-oxabicyclo[10.4.0]hexadeca-1(12),13,15-trien-2-one ChEBI record	Not supplied	C17H24O5308.374 g/mol	2-starThird-party annotation
(3R),(5R)-5-hydroxy-de-O-methyllasiodiplodinPreferred name · CHEBI:199644 Names & database links Source preferred name: (3R),(5R)-5-hydroxy-de-O-methyllasiodiplodin Matching names: (3R),(5R)-5-hydroxy-de-O-methyllasiodiplodin; (4R,6R)-6,14,16-trihydroxy-4-methyl-3-oxabicyclo[10.4.0]hexadeca-1(12),13,15-trien-2-one ChEBI record	Not supplied	C16H22O5294.347 g/mol	2-starThird-party annotation
(3R),(6R)-6-hydroxy-de-O-methyllasiodiplodinPreferred name · CHEBI:197990 Names & database links Source preferred name: (3R),(6R)-6-hydroxy-de-O-methyllasiodiplodin Matching names: (3R),(6R)-6-hydroxy-de-O-methyllasiodiplodin; (4R,7S)-7,14,16-trihydroxy-4-methyl-3-oxabicyclo[10.4.0]hexadeca-1(12),13,15-trien-2-one ChEBI record	Not supplied	C16H22O5294.347 g/mol	2-starThird-party annotation
12(R),13(S)-Epoxy-9(S)-hydroxy-10(E)-octadecenoic acidSource synonym · CHEBI:34148 Names & database links Source preferred name: 12,13-Epoxy-9-hydroxy-10-octadecenoate Matching names: 12(R),13(S)-Epoxy-9(S)-hydroxy-10(E)-octadecenoic acid ChEBI record	Not supplied	C18H32O4312.45 g/mol	2-starThird-party annotation
(-)-12(R),13(S)-vernolateSource synonym · CHEBI:194416 Names & database links Source preferred name: (-)-vernolate Matching names: (-)-12(R),13(S)-vernolate; (12R,13S)-epoxy-(9Z)-octadecenoate; 12R(13S)-epoxy-(9Z)-octadecenoate ChEBI record	Not supplied	C18H31O3295.443 g/mol	3-starChEBI team
(-)-12(R),13(S)-vernolic acidSource synonym · CHEBI:38300 Names & database links Source preferred name: (-)-vernolic acid Matching names: (-)-12(R),13(S)-vernolic acid; (12R,13S)-(9Z)-12,13-Epoxyoctadecenoic acid ChEBI record · PubChem search · CAS lookup	503-07-1	C18H32O3296.451 g/mol	3-starChEBI team
14(R),15(S)-DiHETEPreferred name · CHEBI:136500 Names & database links Source preferred name: 14(R),15(S)-DiHETE Matching names: 14(R),15(S)-DiHETE; (14R,15S)-DiHETE; (14R,15S)-dihydroxy-(5Z,8Z,10E,12E)-eicosatetraenoic acid; (14R,15S)-dihydroxy-(5Z,8Z,10E,12E)-icosatetraenoic acid ChEBI record	Not supplied	C20H32O4336.472 g/mol	3-starChEBI team
14(R),15(S)-DiHETE(1-)Preferred name · CHEBI:133916 Names & database links Source preferred name: 14(R),15(S)-DiHETE(1-) Matching names: 14(R),15(S)-DiHETE(1-); (14R,15S)-DiHETE; (14R,15S)-dihydroxy-(5Z,8Z,10E,12E)-eicosatetraenoate; (14R,15S)-dihydroxy-(5Z,8Z,10E,12E)-icosatetraenoate ChEBI record	Not supplied	C20H31O4335.464 g/mol	3-starChEBI team
14(R),15(S)-DiHPETEPreferred name · CHEBI:136401 Names & database links Source preferred name: 14(R),15(S)-DiHPETE Matching names: 14(R),15(S)-DiHPETE; (14R,15S)-DiHPETE; (14R,15S)-dihydroperoxy-(5Z,8Z,10E,12E)-eicosatetraenoic acid; (14R,15S)-dihydroperoxy-(5Z,8Z,10E,12E)-icosatetraenoic acid ChEBI record	Not supplied	C20H32O6368.47 g/mol	3-starChEBI team
14(R),15(S)-DiHPETE(1-)Preferred name · CHEBI:133900 Names & database links Source preferred name: 14(R),15(S)-DiHPETE(1-) Matching names: 14(R),15(S)-DiHPETE(1-); (14R,15S)-DiHPETE(1-); (14R,15S)-dihydroperoxy-(5Z,8Z,10E,12E)-eicosatetraenoate ChEBI record	Not supplied	C20H31O6367.462 g/mol	3-starChEBI team
10(R),17(R)-dihydroxydocosa-4Z,7Z,11E,13E,15Z,19Z-hexaenoateSource synonym · CHEBI:140208 Names & database links Source preferred name: aspirin-triggered protectin D1(1-) Matching names: 10(R),17(R)-dihydroxydocosa-4Z,7Z,11E,13E,15Z,19Z-hexaenoate ChEBI record	Not supplied	C22H31O4359.486 g/mol	3-starChEBI team
10(R),17(R)-dihydroxydocosa-4Z,7Z,11E,13E,15Z,19Z-hexaenoic acidSource synonym · CHEBI:140202 Names & database links Source preferred name: aspirin-triggered protectin D1 Matching names: 10(R),17(R)-dihydroxydocosa-4Z,7Z,11E,13E,15Z,19Z-hexaenoic acid ChEBI record	Not supplied	C22H32O4360.494 g/mol	3-starChEBI team
10(R),17(S),20-trihydroxydocosa-4Z,7Z,11E,13E,15Z,19Z-hexaenoateSource synonym · CHEBI:140348 Names & database links Source preferred name: 22-hydroxyprotectin D1(1-) Matching names: 10(R),17(S),20-trihydroxydocosa-4Z,7Z,11E,13E,15Z,19Z-hexaenoate ChEBI record	Not supplied	C22H31O5375.485 g/mol	3-starChEBI team
10(R),17(S),20-trihydroxydocosa-4Z,7Z,11E,13E,15Z,19Z-hexaenoic acidSource synonym · CHEBI:140243 Names & database links Source preferred name: 22-hydroxyprotectin D1 Matching names: 10(R),17(S),20-trihydroxydocosa-4Z,7Z,11E,13E,15Z,19Z-hexaenoic acid ChEBI record	Not supplied	C22H32O5376.493 g/mol	3-starChEBI team
10(R),17(S)-dihydroxydocosa-4Z,7Z,11E,13E,15Z,19Z-hexaenoic acidSource synonym · CHEBI:138655 Names & database links Source preferred name: protectin D1 Matching names: 10(R),17(S)-dihydroxydocosa-4Z,7Z,11E,13E,15Z,19Z-hexaenoic acid ChEBI record	Not supplied	C22H32O4360.494 g/mol	3-starChEBI team
17(R),18(S)-EETeTrPreferred name · CHEBI:76953 Names & database links Source preferred name: 17(R),18(S)-EETeTr Matching names: 17(R),18(S)-EETeTr; (17R,18S)-epoxy-(5Z,8Z,11Z,14Z)-eicosatetraenoic acid; (17R,18S)-epoxy-(5Z,8Z,11Z,14Z)-icosatetraenoic acid; 17R,18S-EpETE; 17R,18S-epoxy-5Z,8Z,11Z,14Z-eicosatetraenoic acid ChEBI record	Not supplied	C20H30O3318.457 g/mol	3-starChEBI team
17(R),18(S)-EETeTr(1-)Preferred name · CHEBI:76634 Names & database links Source preferred name: 17(R),18(S)-EETeTr(1-) Matching names: 17(R),18(S)-EETeTr(1-); (17R,18S)-epoxy-(5Z,8Z,11Z,14Z)-eicosatetraenoate; (17R,18S)-epoxy-(5Z,8Z,11Z,14Z)-icosatetraenoate ChEBI record	Not supplied	C20H29O3317.449 g/mol	3-starChEBI team
20(R),22(xi),24(S)-dammar-25(26)-ene-3beta,6alpha,12beta,20,22,24-hexanolPreferred name · CHEBI:65722 Names & database links Source preferred name: 20(R),22(xi),24(S)-dammar-25(26)-ene-3beta,6alpha,12beta,20,22,24-hexanol Matching names: 20(R),22(xi),24(S)-dammar-25(26)-ene-3beta,6alpha,12beta,20,22,24-hexanol ChEBI record	Not supplied	C30H52O6508.74 g/mol	3-starChEBI team
23(R),24(S),25-trihydroxycucurbit-5-ene 3-O-\{[beta-glucopyranosyl(1->6)]-O-beta-glucopyranosyl\}-25-O-beta-glucopyranosidePreferred name · CHEBI:145143 Names & database links Source preferred name: 23(R),24(S),25-trihydroxycucurbit-5-ene 3-O-\{[beta-glucopyranosyl(1->6)]-O-beta-glucopyranosyl\}-25-O-beta-glucopyranoside Matching names: 23(R),24(S),25-trihydroxycucurbit-5-ene 3-O-\{[beta-glucopyranosyl(1->6)]-O-beta-glucopyranosyl\}-25-O-beta-glucopyranoside ChEBI record	Not supplied	C48H82O19963.165 g/mol	2-starThird-party annotation

About this R chemical list

What does “starting with R” mean?

The preferred name or a source-listed synonym begins with R, ignoring leading punctuation and numbers. Alphabetic prefixes such as D-, L-, N-, R-, S- and tert- are retained. A record appears once per letter, with its matching names grouped together. The same record can appear under another letter when it has a different name. Source synonyms can include trade names, abbreviations and names in other languages; they are labelled separately from preferred names.

How complete is the database?

This list includes every matching non-obsolete 2-star and 3-star entry with a formula, structure or valid CAS cross-reference in the downloaded ChEBI 256 snapshot. It excludes abstract classes without these substance identifiers. It is complete for that stated scope, not a list of every chemical known worldwide. ChEBI IDs define the records; related chemical forms are not merged solely because a CAS reference overlaps.

What do the data labels mean?

3-star entries are manually annotated by the ChEBI team; 2-star entries are annotated by third parties. “Not supplied” means that the source has no value for the field. CAS numbers are source cross-references with a valid checksum, not independent CAS verification. Formulas and masses retain source notation; the existing PubCAS profiles retain their documented editorial corrections. Search and lookup links may have no matching result.

Source: ChEBI downloads, EMBL-EBI · release 256 · retrieved 2026-10-11 · CC BY 4.0. Download coverage and source manifest. For handling or purchasing a chemical, verify the exact form and consult the supplier’s current SDS.