Chemical identity

Quinapril EP Impurity D / Quinapril Related Compound A / Quinapril Diketopiperazine

CAS 103733-49-9 · C25H28N2O4

01Identity

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

Lazychem IDLC-26435
PubChem CID29986779
NameQuinapril EP Impurity D / Quinapril Related Compound A / Quinapril Diketopiperazine
CAS RN103733-49-9
Molecular formulaC25H28N2O4
Molecular weight420.5 g/mol
IUPAC nameEthyl (2S)-2-[(3S,11aS)-3-methyl-1,4-dioxo-1,3,4,6,11,11ahexahydro-2H-pyrazino[1,2-b]isoquinolin-2-yl]-4-phenylbutanoate
InChIKeyNDDYKENLGBOEPD-HSQYWUDLSA-N

02Structure identifiers

2D structurePubChem CID 29986779
Two-dimensional chemical structure of Quinapril EP Impurity D / Quinapril Related Compound A / Quinapril Diketopiperazine, CAS 103733-49-9
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 4 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 count4
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESCCOC(=O)[C@H](CCC1=CC=CC=C1)N2[C@H](C(=O)N3CC4=CC=CC=C4C[C@H]3C2=O)C
InChINot listed
Formula from structureC25H28N2O4
Molecular weight from structure420.5 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.

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 103733-49-9 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 103733-49-9 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.

05Names and relationships

Associated parent compound

Quinapril

View API and impurity family

Other names

  • Quinapril EP Impurity D
  • Quinapril Diketopiperazine
  • Quinapril USP Related CompoundA
  • PD 109488
  • 103733-49-9
  • 482564RI35
  • DTXSID20146035
  • RefChem:170508
  • DTXCID5068526
  • (S)-Ethyl 2-((3S,11aS)-3-methyl-1,4-dioxo-3,4,11,11a-tetrahydro-1H-pyrazino[1,2-b]isoquinolin-2(6H)-yl)-4-phenylbutanoate
  • Ethyl (2S)-2-[(3S,11aS)-3-Methyl-1,4-dioxo-1,3,4,6,11,11a-hexahydro-2H-pyrazino[1,2-b]isoquinolin-2-yl]-4-phenylbutanoate
  • ethyl (2S)-2-[(3S,11aS)-3-methyl-1,4-dioxo-3,6,11,11a-tetrahydropyrazino[1,2-b]isoquinolin-2-yl]-4-phenylbutanoate

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