Chemical identity

Cilazapril EP Impurity A

CAS 106860-19-9 · C26H39N3O5

01Identity

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

Lazychem IDLC-10644
PubChem CID11627003
NameCilazapril EP Impurity A
CAS RN106860-19-9
Molecular formulaC26H39N3O5
Molecular weight473.61 g/mol
IUPAC name1,1-dimethylethyl (1S,9S)-9-[[(S)-1-(ethoxycarbonyl)- 3-phenylpropyl]amino]-10-oxooctahydro-6Hpyridazino[ 1,2-a][1,2]diazepine-1-carboxylate
InChIKeyCXTCFWSSABFAEA-FKBYEOEOSA-N

02Structure identifiers

2D structurePubChem CID 11627003
Two-dimensional chemical structure of Cilazapril EP Impurity A, CAS 106860-19-9
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 amines1
Tertiary amines1
N-methyl amine sites0
SMILESCCOC(=O)[C@H](CCC1=CC=CC=C1)N[C@H]2CCCN3CCC[C@H](N3C2=O)C(=O)OC(C)(C)C
InChINot listed
Formula from structureC26H39N3O5
Molecular weight from structure473.61 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

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.

04Possible N-nitroso structures

Shown for structural screening only. These candidates are not confirmed impurities, formation predictions or analytical findings.

Matched amine site1 candidate
Chemical structure of Cilazapril EP Impurity A with the matched amine site highlighted in amber
Amber identifies the screened atom and adjacent bonds.
Possible structure candidateUnverified identity
First calculated possible N-nitroso structure derived from Cilazapril EP Impurity A, with the new N-nitroso group highlighted in amber
The new N-N=O atoms and bonds are highlighted. No CAS number or compound name is assigned by this calculation.
Candidate 1Possible N-nitroso structural candidate
Calculated formula
C26H38N4O6
Candidate SMILES
CCOC(=O)[C@H](CCc1ccccc1)N(N=O)[C@H]1CCCN2CCC[C@@H](C(=O)OC(C)(C)C)N2C1=O

Interpretation: A structural alert alone does not establish that a nitrosamine forms. Evaluate nitrite sources, amine reagents, pH, temperature, process sequence, purge and analytical evidence.

05India 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 106860-19-9 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 106860-19-9 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.

06Names and relationships

Associated parent compound

Cilazapril

View API and impurity family

Other names

  • 106860-19-9
  • Cilazapril EP Impurity A
  • 1,1-Dimethylethyl (1S,9S)-9-[[(1S)-1-(ethoxycarbonyl)-3-phenylpropyl]amino]octahydro-10-oxo-6H-pyridazino[1,2-a][1,2]diazepine-1-carboxylate
  • Cilazapril impurity A CRS
  • YP44HV73WD
  • SCHEMBL12468875
  • DTXSID001101180
  • (1S,9S)-tert-butyl 9-(((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)amino)-10-oxooctahydro-1H-pyridazino[1,2-a][1,2]diazepine-1-carboxylate
  • 6H-Pyridazino[1,2-a][1,2]diazepine-1-carboxylic acid, 9-[[(1S)-1-(ethoxycarbonyl)-3-phenylpropyl]amino]octahydro-10-oxo-, 1,1-dimethylethyl ester, (1S,9S)-
  • 6H-Pyridazino[1,2-a][1,2]diazepine-1-carboxylic acid, 9-[[1-(ethoxycarbonyl)-3-phenylpropyl]amino]octahydro-10-oxo-, 1,1-dimethylethyl ester, [1S-[1alpha,9alpha(R*)]]-

Related records from the same parent family

07Documented 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.

08Sources