Chemical identity

Captopril EP Impurity E

CAS 23500-15-4 · C9H15NO3

01Identity

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

Lazychem IDLC-09353
PubChem CID15324300
NameCaptopril EP Impurity E
CAS RN23500-15-4
Molecular formulaC9H15NO3
Molecular weight185.22 g/mol
IUPAC name(2S)-1-(2-methylpropanoyl)pyrrolidine-2-carboxylic acid
InChIKeyWKQUFVTUGGLNNO-ZETCQYMHSA-N

02Structure identifiers

2D structurePubChem CID 15324300
Two-dimensional chemical structure of Captopril EP Impurity E, CAS 23500-15-4
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 1 ring, includes aliphatic carbon, has 1 defined stereocentre. These statements are calculated from the published structure string.

Defined stereocentres1
Unassigned stereocentres0
Ring count1
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESCC(C)C(=O)N1CCC[C@H]1C(=O)O
InChINot listed
Formula from structureC9H15NO3
Molecular weight from structure185.22 g/mol

03Stereochemistry

The published structure contains 1 defined and 0 unassigned tetrahedral stereocentre. The exact wedge and dash depiction is shown above.

Defined centres1Structure assigned
Unassigned centres0Structure unspecified
Assignment statusFully assignedExact published identity
Tetrahedral upper bound≤ 2Before symmetry reduction

Published same-connectivity configurations

1 record

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.

No additional structure-linked configuration with the same connectivity is currently present in the LazyChem dataset.

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 23500-15-4 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 23500-15-4 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

Captopril

View API and impurity family

Other names

  • Captopril Desmercapto Impurity
  • Isobutyrylproline
  • 23500-15-4
  • (2S)-1-(2-methylpropanoyl)pyrrolidine-2-carboxylic acid
  • L-Proline, 1-(2-methyl-1-oxopropyl)-
  • Captopril Impurity E
  • Proline, 1-isobutyryl-, L
  • 1-Isobutyrylproline, (-)-
  • Captopril impurity E [EP]
  • UNII-27JC6R80S1
  • 27JC6R80S1
  • Captopril specified impurity E [EP]

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