Chemical identity

Entecavir EP Impurity A

CAS 1367369-78-5 · C12H15N5O3

01Identity

Identifiers and names for this exact compound. Empty fields are left unassigned.

Lazychem IDLC-14144
PubChem CID135743573
NameEntecavir EP Impurity A
CAS RN1367369-78-5
Molecular formulaC12H15N5O3
Molecular weight277.28 g/mol
IUPAC name2-amino-9-((1R,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-1,9-dihydro-6H-purin-6-one
InChIKeyQDGZDCVAUDNJFG-RNJXMRFFSA-N

02Structure identifiers

2D structurePubChem CID 135743573
Two-dimensional chemical structure of Entecavir EP Impurity A, CAS 1367369-78-5
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 3 rings, includes aromatic atoms, includes aliphatic carbon, has 3 defined stereocentres. These statements are calculated from the published structure string.

Defined stereocentres3
Unassigned stereocentres0
Ring count3
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESC=C1[C@@H](C[C@@H]([C@H]1CO)O)N2C=NC3=C2N=C(NC3=O)N
InChINot listed
Formula from structureC12H15N5O3
Molecular weight from structure277.28 g/mol

03Stereochemistry

The published structure contains 3 defined and 0 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.

Defined centres3Structure assigned
Unassigned centres0Structure unspecified
Assignment statusFully assignedExact published identity
Tetrahedral upper bound≤ 8Before symmetry reduction

Published same-connectivity configurations

7 records

These records have the same connectivity, molecular formula and protonation layer, but a different complete InChIKey stereochemical layer. Only separately structure-linked records are shown.

Scope: The mathematical 2^n value is only an upper bound. Symmetry and other stereogenic elements can change the number of distinct stereoisomers. A hypothetical configuration is not published as a compound record without a verified structure identity.

04India status for this compound

These results apply only to this exact compound name and CAS number. Confirm the current official instruments before making a regulatory decision.

NDPS / RCSNO EXACT MATCH FOUNDCAS 1367369-78-5 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 1367369-78-5 has no exact match in the reviewed SCOMET list.
Review date2026-08-01Recheck the current official instruments for the material, concentration, activity and date in question.

05Names and relationships

Associated parent compound

Entecavir

View API and impurity family

Other names

  • Entecavir 1-epimer
  • 1367369-78-5
  • LNS2U38C9S
  • Entecavir 1-epimer [USP]
  • ENTECAVIR 1-EPIMER [USP IMPURITY]
  • 9-((1R,3R,4S)-4-Hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)guanine
  • 2-Amino-1,9-dihydro-9-((1R,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-6H-purin-6-one
  • 6H-Purin-6-one, 2-amino-1,9-dihydro-9-((1R,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-
  • RefChem:590860
  • 1'-epi-Entecavir
  • Entecavir EP Impurity A
  • Entecavir Impurity A

Related records from the same parent family

06Documented history

Dated discovery, occurrence, use and issue claims are published only when a suitable primary or government source is available.

No dated history available

No verified discovery, first report, occurrence, use or issue event is currently available for this identity.

07Sources