
Chemical identity
N-Nitroso Perindopril EP Impurity O
CAS not listed · C28H44N4O7
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-22281 |
|---|---|
| PubChem CID | 176477833 |
| Name | N-Nitroso Perindopril EP Impurity O |
| CAS RN | Not listed |
| Molecular formula | C28H44N4O7 |
| Molecular weight | 548.67 g/mol |
| IUPAC name | (2S,3aS,7aS)-1-((2S,3aS,7aS)-1-((S)-2-(((S)-1-ethoxy-1-oxopentan-2-yl)(nitroso)amino)propanoyl)octahydro-1H-indole-2-carbonyl)octahydro-1H-indole-2-carboxylic acid |
| InChIKey | XGKFWXHDWDHULL-OPKHLUCYSA-N |
02Structure identifiers

Structure facts for this exact identity.
| Molecular formula | C28H44N4O7 |
|---|---|
| InChIKey | XGKFWXHDWDHULL-OPKHLUCYSA-N |
| Ring count | 4 |
| Defined stereocentres | 8 |
| Unassigned stereocentres | 0 |
| SMILES | CCC[C@@H](C(=O)OCC)N([C@@H](C)C(=O)N1[C@H]2CCCC[C@H]2C[C@H]1C(=O)N3[C@H]4CCCC[C@H]4C[C@H]3C(=O)O)N=O |
|---|---|
| InChI | InChI=1S/C28H44N4O7/c1-4-10-22(28(37)39-5-2)32(29-38)17(3)25(33)30-20-13-8-6-11-18(20)15-23(30)26(34)31-21-14-9-7-12-19(21)16-24(31)27(35)36/h17-24H,4-16H2,1-3H3,(H,35,36)/t17-,18-,19-,20-,21-,22-,23-,24-/m0/s1 |
03Stereochemistry
The published structure contains 8 defined and 0 unassigned tetrahedral stereocentres. The exact wedge-and-dash depiction is shown above.
Published same-connectivity configurations
1 recordThese 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 / RCS | NOT FOUND IN REVIEWED ENTRIES | No CAS number is available for an exact comparison. Generic and analogue entries were not evaluated. |
|---|---|---|
| SCOMET | NOT FOUND IN REVIEWED CAS ENTRIES | No CAS number is available for an exact comparison. Generic and analogue entries were not evaluated. |
- Narcotic Drugs and Psychotropic Substances Act, 1985, ScheduleDepartment of Revenue, Government of India · source version 1985-09-16
- Controlled-substances notifications and amendmentsDepartment of Revenue, Government of India · source version 2026-03-11
- Appendix 3, SCOMET ListDirectorate General of Foreign Trade, Government of India · source version 2024-09-02
05Names and relationships
Associated parent compound
Perindopril/ N-Nitroso
View API and impurity familyOther names
No synonyms are listed.
06Documented history
Dated discovery, occurrence, use and issue claims are published only when a suitable primary or government source is available.
No verified discovery, first report, occurrence, use or issue event is currently available for this identity.
07Sources
- S01PubChem compound record, CID 176477833
Names and machine-readable chemical identity properties.
- S02NCBI website and molecular data policies
Reuse policy for NCBI molecular data. This page does not reproduce vendor descriptions or contributed narrative text.
- S03Narcotic Drugs and Psychotropic Substances Act, 1985, Schedule
Department of Revenue, Government of India. Used for the exact-compound India status shown on this page.
- S04Controlled-substances notifications and amendments
Department of Revenue, Government of India. Used for the exact-compound India status shown on this page.
- S05Appendix 3, SCOMET List
Directorate General of Foreign Trade, Government of India. Used for the exact-compound India status shown on this page.
