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Chemical substance record

Cyclopentolate

512-15-2C17H25NO3291.391 g/mol
Organic/Inorganic Small MoleculeChEBI source record

A carboxylic ester resulting from the formal condensation of (1-hydroxycyclopentyl)(phenyl)acetic acid with N,N-dimethylethanolamine. A tertiary amine antimuscarinic with actions similar to atropine, it is used as its hydrochloride salt to produce mydriasis (excessive dilation of the pupil) and cycloplegia (paralysis of the ciliary muscle of the eye) for opthalmic diagnostic procedures. It acts more quickly than atropine and has a shorter duration of action. — ChEBI

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Identity & molecular properties

Source-linked values
CAS number512-15-2ChEBI ↗
Molecular formulaC17H25NO3ChEBI ↗
Molar mass291.391 g/molChEBI ↗
Monoisotopic mass291.18344 DaChEBI ↗
Formal charge0ChEBI ↗
ChEBI identifierCHEBI:4024ChEBI ↗

Cross-source molecular data

PubChem
Molar mass291.4 g/molPubChem ↗
Exact mass291.18344366 DaPubChem ↗
Computed XLogP2.7PubChem ↗
Topological polar surface area (Ų)49.8PubChem ↗
H-bond donors1PubChem ↗
H-bond acceptors4PubChem ↗
Rotatable bonds7PubChem ↗

PubChem computed values are shown separately from the ChEBI record. An exact InChIKey match was used to connect the records. Molecular descriptors do not describe a supplied product’s purity, particle size or performance.

Names & structural identifiers

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cyclopentolate
2-(dimethylamino)ethyl (1-hydroxycyclopentyl)(phenyl)acetate
SKYSRIRYMSLOIN-UHFFFAOYSA-N
CN(C)CCOC(=O)C(c1ccccc1)C1(O)CCCC1
InChI=1S/C17H25NO3/c1-18(2)12-13-21-16(19)15(14-8-4-3-5-9-14)17(20)10-6-7-11-17/h3-5,8-9,15,20H,6-7,10-13H2,1-2H3

Names & synonyms

2-(dimethylamino)ethyl (1-hydroxycyclopentyl)(phenyl)acetateciclopentolatocyclopentolatum

Names are supplied by ChEBI. Trade names and related synonyms may describe a broader product context.

Classification & relationships

ChEBI ontology
tertiary alcoholChEBI parent class · 26878 ↗carboxylic esterChEBI parent class · 33308 ↗tertiary amino compoundChEBI parent class · 50996 ↗
alcoholesterorganic molecular entity

Roles recorded in ChEBI

diagnostic agentmuscarinic antagonistparasympatholyticmydriatic agentophthalmology drug

Database role annotations describe reported biological or chemical roles; they are not product approvals or recommendations for use.

Mass ↔ amount of substance

Calculated from sourced mass
Equivalent amount
0.00343181 mol

Uses 291.391 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.

Elemental composition

Theoretical mass fractions
C
Carbon · 17 atoms
70.07%
O
Oxygen · 3 atoms
16.47%
H
Hydrogen · 25 atoms
8.65%
N
Nitrogen · 1 atom
4.81%

Calculated theoretical mass fractions from the reported formula and PubChem periodic-table atomic masses. These are not assay or purity results.

Research & patent references

Selected source associations
US2554511 · Patent reference ↗Patent cross-reference supplied by ChEBI. Association alone does not establish claim scope.
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Sources & record history

Checked 27 Sep 2026
EMBL-EBI ChEBI · CHEBI:4024

Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0

NCBI PubChem · CID 2905 · retrieved 2026-09-27

PubCAS formats source data, connects references and computes explicitly labelled conversions. CAS cross-references are supplied by ChEBI; they do not constitute CAS verification or endorsement.

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