Chemical identity
Trimethoprim EP Impurity G / 4-O-Desmethyl 4-O-Ethyl Trimethoprim
CAS 78025-68-0 · C15H20N4O3
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-30256 |
|---|---|
| PubChem CID | 12752253 |
| Name | Trimethoprim EP Impurity G / 4-O-Desmethyl 4-O-Ethyl Trimethoprim |
| CAS RN | 78025-68-0 |
| Molecular formula | C15H20N4O3 |
| Molecular weight | 304.34 |
| IUPAC name | 5-(4-Ethoxy-3,5-dimethoxybenzyl)pyrimidine-2,4-diamine |
| InChIKey | XWUQANDETYXOIU-UHFFFAOYSA-N |
02Structure identifiers

The parsed structure contains 2 rings, includes aromatic atoms, includes aliphatic carbon. These statements are calculated from the published structure string.
| Defined stereocentres | 0 |
|---|---|
| Unassigned stereocentres | 0 |
| Ring count | 2 |
| Secondary amines | 0 |
| Tertiary amines | 0 |
| N-methyl amine sites | 0 |
| SMILES | CCOC1=C(C=C(C=C1OC)CC2=CN=C(N=C2N)N)OC |
|---|---|
| InChI | Not listed |
| Formula from structure | C15H20N4O3 |
| Molecular weight from structure | 304.34 |
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 78025-68-0 has no exact match in the reviewed published schedule. |
|---|---|---|
| SCOMET | NO EXACT REVIEWED CAS MATCH | CAS 78025-68-0 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
Trimethoprim
View API and impurity familyOther names
- Trimethoprim EP Impurity G
- 5-(4-Ethoxy-3,5-dimethoxybenzyl)pyrimidine-2,4-diamine
- 78025-68-0
- 4-O-Desmethyl 4-O-Ethyl Trimethoprim
- 4-Desmethoxy-4-ethoxy trimethoprim
- 5-[(4-ethoxy-3,5-dimethoxyphenyl)methyl]pyrimidine-2,4-diamine
- 29X0GX73RM
- 2,4-Pyrimidinediamine, 5-((4-ethoxy-3,5-dimethoxyphenyl)methyl)-
- UNII-29X0GX73RM
- Trimethoprim impurity G [EP]
- Trimethoprim Imp. G (EP)
- Trimethoprim Impurity G
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 12752253
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.
