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Chemical substance record

Cytarabine

147-94-4C9H13N3O5243.219 g/mol
Organic/Inorganic Small MoleculeChEBI source record

A pyrimidine nucleoside in which cytosine is attached to D-arabinofuranose via a β-N1-glycosidic bond. Used mainly in the treatment of leukaemia, especially acute non-lymphoblastic leukaemia, cytarabine is an antimetabolite antineoplastic agent that inhibits the synthesis of DNA. It also has antiviral and immunosuppressant properties. — ChEBI

Safety references

Safety documents & references

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Identity & molecular properties

Source-linked values
CAS number147-94-4ChEBI ↗
Molecular formulaC9H13N3O5ChEBI ↗
Molar mass243.219 g/molChEBI ↗
Monoisotopic mass243.08552 DaChEBI ↗
Formal charge0ChEBI ↗
ChEBI identifierCHEBI:28680ChEBI ↗

Cross-source molecular data

PubChem
Molar mass243.22 g/molPubChem ↗
Exact mass243.08552052 DaPubChem ↗
Computed XLogP-2.1PubChem ↗
Topological polar surface area (Ų)129PubChem ↗
H-bond donors4PubChem ↗
H-bond acceptors5PubChem ↗
Rotatable bonds2PubChem ↗

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

Copy any identifier
cytarabine
4-amino-1-beta-D-arabinofuranosylpyrimidin-2(1H)-one
UHDGCWIWMRVCDJ-CCXZUQQUSA-N
Nc1ccn([C@@H]2O[C@H](CO)[C@@H](O)[C@@H]2O)c(=O)n1
InChI=1S/C9H13N3O5/c10-5-1-2-12(9(16)11-5)8-7(15)6(14)4(3-13)17-8/h1-2,4,6-8,13-15H,3H2,(H2,10,11,16)/t4-,6-,7+,8-/m1/s1

Names & synonyms

4-amino-1-beta-D-arabinofuranosylpyrimidin-2(1H)-onecitarabinacytarabinum

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

Classification & relationships

ChEBI ontology
pyrimidine nucleosideChEBI parent class · 26440 ↗beta-D-arabinosideChEBI parent class · 38315 ↗monosaccharide derivativeChEBI parent class · 63367 ↗
nucleosideorganic heterocyclic compoundorganic molecular entity

Roles recorded in ChEBI

antiviral agentantifibrotic agentantimetaboliteantineoplastic agentimmunosuppressive agentantimalarialanticoagulantanti-inflammatory agentanti-anaemic agent

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
0.00411152 mol

Uses 243.219 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 · 9 atoms
44.45%
O
Oxygen · 5 atoms
32.89%
N
Nitrogen · 3 atoms
17.28%
H
Hydrogen · 13 atoms
5.39%

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
Impact of cytidine deaminase activity on intrinsic resistance to cytarabine in carcinoma cells. ↗Oncology reports · 2004 Nov · PMID 15492802
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Sources & record history

Checked 27 Sep 2026
EMBL-EBI ChEBI · CHEBI:28680

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

NCBI PubChem · CID 6253 · 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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