
Chemical identity
Carteolol HCl EP Impurity C
CAS 51781-14-7 · C12H13NO3
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-09572 |
|---|---|
| PubChem CID | 12899423 |
| Name | Carteolol HCl EP Impurity C |
| CAS RN | 51781-14-7 |
| Molecular formula | C12H13NO3 |
| Molecular weight | 219.24 g/mol |
| IUPAC name | 5-[[(2RS)-oxiran-2-yl]methoxy]-3,4-dihydroquinolin-2(1H)-one, |
| InChIKey | VQTWQOBNPISQPG-UHFFFAOYSA-N |
02Structure identifiers

The parsed structure contains 3 rings, includes aromatic atoms, includes aliphatic carbon. These statements are calculated from the published structure string.
| Defined stereocentres | 0 |
|---|---|
| Unassigned stereocentres | 1 |
| Ring count | 3 |
| Secondary amines | 0 |
| Tertiary amines | 0 |
| N-methyl amine sites | 0 |
| SMILES | C1CC(=O)NC2=C1C(=CC=C2)OCC3CO3 |
|---|---|
| InChI | Not listed |
| Formula from structure | C12H13NO3 |
| Molecular weight from structure | 219.24 g/mol |
03Stereochemistry
The published structure contains 0 defined and 1 unassigned tetrahedral stereocentre. 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 | NO EXACT MATCH FOUND | CAS 51781-14-7 has no exact match in the reviewed published schedule. |
|---|---|---|
| SCOMET | NO EXACT REVIEWED CAS MATCH | CAS 51781-14-7 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
05Names and relationships
Associated parent compound
Carteolol
View API and impurity familyOther names
- 5-(2,3-Epoxypropoxy)-3,4-dihydrocarbostyril
- 51781-14-7
- 5-(OXIRAN-2-YLMETHOXY)-3,4-DIHYDRO-1H-QUINOLIN-2-ONE
- 2WA9ZP4G9Y
- 3,4-Dihydro-5-(2-oxiranylmethoxy)-2(1H)-quinolinone
- 2(1H)-Quinolinone, 3,4-dihydro-5-(2-oxiranylmethoxy)-
- CARTEOLOL HYDROCHLORIDE IMPURITY C [EP IMPURITY]
- 5-(((2RS)-Oxiran-2-yl)methoxy)-3,4-dihydroquinolin-2(1H)-one
- RefChem:198838
- Carteolol EP Impurity C
- 5-[(oxiran-2-yl)methoxy]-1,2,3,4-tetrahydroquinolin-2-one
- 5-(Oxiran-2-ylmethoxy)-3,4-dihydroquinolin-2(1H)-one
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 12899423
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.
