Direct N-nitroso substructure search.
API and parent drug
Estazolam
CAS 29975-16-4 · C16H11ClN4 · 4 related records
01API identity and structure
2D structurePubChem CID 3261
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.
| API / medicine name | Estazolam |
|---|---|
| CAS RN | 29975-16-4 |
| PubChem CID | 3261 |
| Molecular formula | C16H11ClN4 |
| Molecular weight | 294.74 g/mol |
| IUPAC name | 8-chloro-6-phenyl-4H-[1,2,4]triazolo[4,3-a][1,4]benzodiazepine |
| Defined stereocentres | 0 |
| Unassigned stereocentres | 0 |
| SMILES | C1C2=NN=CN2C3=C(C=C(C=C3)Cl)C(=N1)C4=CC=CC=C4 |
|---|---|
| InChI | Not listed |
| InChIKey | CDCHDCWJMGXXRH-UHFFFAOYSA-N |
02Structural nitrosamine screen
This is a structure-only screen for the API. It does not predict manufacturing conditions, nitrite exposure, reaction kinetics or analytical results.
A detected secondary amine is a structural alert that requires process-specific assessment.
N-dealkylation can be relevant to impurity pathway assessment. A methyl group elsewhere in the molecule is not treated as a nitrosamine alert.
Interpretation: Formation potential cannot be concluded from structure alone. Review the synthesis, recovered solvents, amine reagents, nitrite sources, pH, temperature and purge controls.
03India status for this compound
The result below applies only to this exact compound identity and CAS number.
| NDPS / RCS | NO EXACT MATCH FOUND | No exact match for this compound is present in the reviewed record. Confirm against the current official schedule before making a regulatory decision. |
|---|---|---|
| SCOMET | NO EXACT CAS MATCH FOUND | CAS 29975-16-4 does not have an exact match in the reviewed SCOMET entries. |
| Review date | 2026-08-01 | Check the current official instruments for the material, activity and date in question. |
- Narcotic Drugs and Psychotropic Substances Act, 1985, ScheduleDepartment of Revenue, Government of India
- Controlled-substances notifications and amendmentsDepartment of Revenue, Government of India
- Appendix 3, SCOMET ListDirectorate General of Foreign Trade, Government of India
04Impurities and related compounds
Records whose supplied parent field identifies Estazolam. Each link opens the exact chemical identity page.
2D structurePubChem CID 12246022
2D structurePubChem CID 9567856
2D structurePubChem CID 69567485
![Two-dimensional chemical structure of 7-chloro-5-phenyl-[1,2,4]triazolo[4,3-a]quinolin-4-amine, CAS 163167-55-3](/structures/pubchem/69567485-300.png)
2D structurePubChem CID 11970484
Estazolam Related Compound A
37945-06-5
05Sources
- S01PubChem compound record, CID 3261
Structure, identifiers and machine-readable properties for the API identity.
- S02NCBI website and molecular data policies
Reuse policy for NCBI molecular data. Vendor descriptions and contributed narrative text are not reproduced.
- S03Lazychem chemical records
Parent-family links are exact normalized matches to the supplied parent field. Structural alerts are calculated from the published API structure.