Chemical identity
Risperidone E,Z-Oxime (Mixture)
CAS 158697-66-6 · C23H28F2N4O2
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-27089 |
|---|---|
| PubChem CID | 10048326 |
| Name | Risperidone E,Z-Oxime (Mixture) |
| CAS RN | 158697-66-6 |
| Molecular formula | C23H28F2N4O2 |
| Molecular weight | 430.49 g/mol |
| IUPAC name | 3-(2-(4-((2,4-Difluorophenyl)(hydroxyimino)methyl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one |
| InChIKey | BRCINVRBDDVLDW-QYQHSDTDSA-N |
02Structure identifiers

The parsed structure contains 4 rings, includes aromatic atoms, includes aliphatic carbon, contains at least one halogen atom. These statements are calculated from the published structure string.
| Defined stereocentres | 0 |
|---|---|
| Unassigned stereocentres | 0 |
| Ring count | 4 |
| Secondary amines | 0 |
| Tertiary amines | 1 |
| N-methyl amine sites | 0 |
| SMILES | O=C1C(CCN2CCC(/C(C3=CC=C(F)C=C3F)=N/O)CC2)=C(C)N=C4N1CCCC4 |
|---|---|
| InChI | Not listed |
| Formula from structure | C23H28F2N4O2 |
| Molecular weight from structure | 430.49 g/mol |
03India 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 | NO EXACT MATCH FOUND | CAS 158697-66-6 has no exact match in the reviewed published schedule. |
|---|---|---|
| SCOMET | NO EXACT REVIEWED CAS MATCH | CAS 158697-66-6 has no exact match in the reviewed SCOMET list. |
| Review date | 2026-08-01 | Recheck the current official instruments for the material, concentration, activity and date in question. |
- Narcotic Drugs and Psychotropic Substances Act, 1985, ScheduleDepartment of Revenue, Government of India · reviewed 2026-08-01
- Controlled-substances notifications and amendmentsDepartment of Revenue, Government of India · reviewed 2026-08-01
- Appendix 3, SCOMET ListDirectorate General of Foreign Trade, Government of India · reviewed 2026-08-01
04Names and relationships
Associated parent compound
Risperidone
View API and impurity familyOther names
- Risperidone EP Impurity B
- Risperidone BP Impurity B / Risperidone Z-Oxime
- Risperidone Z-oxime
- 132961-05-8
- 2-Fluoro risperidone Z-oxime
- 3-[2-[4-[(Z)-(2,4-DIFLUOROPHENYL)(HYDROXYIMINO)METHYL]-1-PIPERIDINYL]ETHYL]-6,7,8,9-TETRAHYDRO-2-METHYL-4H-PYRIDO[1,2-A]PYRIMIDIN-4-ONE
- 2D16ZRA893
- Risperidone specified impurity B [EP]
- DTXSID201035868
- 3-(2-(4-((Z)-(2,4-Difluorophenyl)(hydroxyimino)methyl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido(1,2-a)pyrimidin-4-one
- 4H-Pyrido(1,2-a)pyrimidin-4-one, 3-(2-(4-((Z)-(2,4-difluorophenyl)(hydroxyimino)methyl)-1-piperidinyl)ethyl)-6,7,8,9-tetrahydro-2-methyl-
- RISPERIDONE IMPURITY B [EP IMPURITY]
05Documented 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.
06Sources
- S01PubChem compound record, CID 10048326
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.
