Chemical identity
4-((2,4-Diaminopyrimidin-5-yl)methyl)-2,6-dimethoxyphenol / Trimethoprim Impurity Y / 4-Demethyltrimethoprim
CAS 21253-58-7 · C13H16N4O3
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-02796 |
|---|---|
| PubChem CID | 10423570 |
| Name | 4-((2,4-Diaminopyrimidin-5-yl)methyl)-2,6-dimethoxyphenol / Trimethoprim Impurity Y / 4-Demethyltrimethoprim |
| CAS RN | 21253-58-7 |
| Molecular formula | C13H16N4O3 |
| Molecular weight | 276.29 g/mol |
| IUPAC name | 4-((2,4-Diaminopyrimidin-5-yl)methyl)-2,6-dimethoxyphenol |
| InChIKey | HPOCGNHBIFZCAN-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 | OC1=C(OC)C=C(CC2=CN=C(N)N=C2N)C=C1OC |
|---|---|
| InChI | Not listed |
| Formula from structure | C13H16N4O3 |
| Molecular weight from structure | 276.29 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 21253-58-7 has no exact match in the reviewed published schedule. |
|---|---|---|
| SCOMET | NO EXACT REVIEWED CAS MATCH | CAS 21253-58-7 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
04Names and relationships
Associated parent compound
Trimethoprim
View API and impurity familyOther names
- 4-((2,4-Diaminopyrimidin-5-yl)methyl)-2,6-dimethoxyphenol
- Trimethoprim Impurity Y
- 4-Demethyltrimethoprim
- 4'-Hydroxytrimethoprim
- 2, 4-diamino-5-(3, 5-dimethoxy-4-hydroxybenzyl)pyrimidine
- 4-Desmethyltrimethoprim
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 10423570
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.
