No record-level structural candidate is currently published for this identity.
API and parent drug
Cimetidine
CAS 51481-61-9 · C10H16N6S · 12 related records
01API identity and structure
2D structurePubChem CID 2756

| API / medicine name | Cimetidine |
|---|---|
| CAS RN | 51481-61-9 |
| PubChem CID | 2756 |
| Molecular formula | C10H16N6S |
| Molecular weight | 252.34 g/mol |
| IUPAC name | 1-cyano-2-methyl-3-[2-[(5-methyl-1H-imidazol-4-yl)methylsulfanyl]ethyl]guanidine |
| Defined stereocentres | 0 |
| Unassigned stereocentres | 0 |
| SMILES | CC1=C(N=CN1)CSCCNC(=NC)NC#N |
|---|---|
| InChI | Not listed |
| InChIKey | AQIXAKUUQRKLND-UHFFFAOYSA-N |
02Structural nitrosamine screen
This result does not predict manufacturing conditions, formation, analytical findings or absence of risk. A process-specific assessment is required.
03India status for this compound
The result below applies only to this exact compound identity and CAS number.
| NDPS / RCS | NOT FOUND IN REVIEWED ENTRIES | No exact reviewed identity entry was found. Generic, class, analogue, salt and isomer provisions were not evaluated. Confirm the current official schedule before a regulatory decision. |
|---|---|---|
| SCOMET | NOT FOUND IN REVIEWED CAS ENTRIES | CAS 51481-61-9 was not found in the reviewed exact-CAS mapping. 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
05Sources
- S01PubChem compound record, CID 2756
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 use the supplied parent identity.

![2D structure: 3-Cyano-2-ethyl-1-[2-[[(5-methyl-1H-imidazol-4-yl)methyl]sulphanyl]ethyl]isourea, CAS 75850-09-8](/structures/pubchem/13217493/75850-09-8-3-cyano-2-ethyl-1-2-5-methyl-1h-imidazol-4-yl-methyl-sulphanyl-ethyl-isourea-2d-structure-300.png)










