
Chemical identity
Desmethyl Ceftaroline Fosamil
CAS 1286218-72-1 · C21H19N8O8PS4
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-10073 |
|---|---|
| PubChem CID | 118656442 |
| Name | Desmethyl Ceftaroline Fosamil |
| CAS RN | 1286218-72-1 |
| Molecular formula | C21H19N8O8PS4 |
| Molecular weight | 670.64 g/mol |
| IUPAC name | (6R,7R)-7-((Z)-2-(Ethoxyimino)-2-(5-(phosphonoamino)-1,2,4-thiadiazol-3-yl)acetamido)-8-oxo-3-((4-(pyridin-4-yl)thiazol-2-yl)thio)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid |
| InChIKey | KNFZNJURPUBKOA-VKKUPRKASA-N |
02Structure identifiers

The parsed structure contains 5 rings, includes aromatic atoms, includes aliphatic carbon, has 2 defined stereocentres. These statements are calculated from the published structure string.
| Defined stereocentres | 2 |
|---|---|
| Unassigned stereocentres | 0 |
| Ring count | 5 |
| Secondary amines | 0 |
| Tertiary amines | 0 |
| N-methyl amine sites | 0 |
| SMILES | CCO/N=C(/C1=NSC(=N1)NP(=O)(O)O)\C(=O)N[C@H]2[C@@H]3N(C2=O)C(=C(CS3)SC4=NC(=CS4)C5=CC=NC=C5)C(=O)O |
|---|---|
| InChI | Not listed |
| Formula from structure | C21H19N8O8PS4 |
| Molecular weight from structure | 670.64 g/mol |
03Stereochemistry
The published structure contains 2 defined and 0 unassigned tetrahedral stereocentres. 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 1286218-72-1 has no exact match in the reviewed published schedule. |
|---|---|---|
| SCOMET | NO EXACT REVIEWED CAS MATCH | CAS 1286218-72-1 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
Ceftaroline Fosamil
View associated product familyOther names
- Ceftaroline Fosamil Impurity 10
- Desmethyl Ceftaroline Fosamil
- 1286218-72-1
- Ceftaroline Fosamil Impurity 5
- Ceftaroline Impurity 6
- SCHEMBL17431719
- (6R,7R)-7-((Z)-2-(ethoxyimino)-2-(5-(phosphonoamino)-1,2,4-thiadiazol-3-yl)acetamido)-8-oxo-3-((4-(pyridin-4-yl)thiazol-2-yl)thio)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
- 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 7-[[(2Z)-2-(ethoxyimino)-2-[5-(phosphonoamino)-1,2,4-thiadiazol-3-yl]acetyl]amino]-8-oxo-3-[[4-(4-pyridinyl)-2-thiazolyl]thio]-, (6R,7R)-
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 118656442
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.
