
Chemical identity
Cefdinir Related Compound A
CAS 178422-42-9 · C14H15N5O6S2
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-09797 |
|---|---|
| PubChem CID | 71587584 |
| Name | Cefdinir Related Compound A |
| CAS RN | 178422-42-9 |
| Molecular formula | C14H15N5O6S2 |
| Molecular weight | 413.43 g/mol |
| IUPAC name | (2R)-2-[(Z)-2-(2-Aminothiazol-4-yl)-2-(hydroxyimino)acetamido]-2-[(2RS,5RS)-5-methyl-7-oxo-2,4,5,7- tetrahydro-1H-furo[3,4-d][1,3]thiazin-2-yl]acetic acid) |
| InChIKey | DKFLDACXFQGVEO-YJHPLJFSSA-N |
02Structure identifiers

Structure facts for this exact identity.
| Molecular formula | C14H15N5O6S2 |
|---|---|
| InChIKey | DKFLDACXFQGVEO-YJHPLJFSSA-N |
| Ring count | 3 |
| Defined stereocentres | 1 |
| Unassigned stereocentres | 2 |
| SMILES | CC1C2=C(C(=O)O1)NC(SC2)[C@@H](C(=O)O)NC(=O)/C(=N\O)/C3=CSC(=N3)N |
|---|---|
| InChI | InChI=1S/C14H15N5O6S2/c1-4-5-2-26-11(18-7(5)13(23)25-4)9(12(21)22)17-10(20)8(19-24)6-3-27-14(15)16-6/h3-4,9,11,18,24H,2H2,1H3,(H2,15,16)(H,17,20)(H,21,22)/b19-8-/t4?,9-,11?/m0/s1 |
03Stereochemistry
The published structure contains 1 defined and 2 unassigned tetrahedral stereocentres. The exact wedge-and-dash depiction is shown above.
Published same-connectivity configurations
3 recordsThese records have the same connectivity, molecular formula and protonation layer, but a different complete InChIKey stereochemical layer. Only separately structure-linked records are shown.

![2D structure: 2-(2-(2-aminothiazol-4-yl)-2-(hydroxyimino)acetamido)-2-(5-methyl-7-oxo-1,2,5,7-tetrahydro-4H-furo[3,4-d][1,3]thiazin-2-yl)acetic acid](/structures/pubchem/78122653/no-cas-2-2-2-aminothiazol-4-yl-2-hydroxyimino-acetamido-2-5-methyl-7-oxo-1-2-5-7-tetrahydro-4h-fu-2d-structure-300.png)
2-(2-(2-aminothiazol-4-yl)-2-(hydroxyimino)acetamido)-2-(5-methyl-7-oxo-1,2,5,7-tetrahydro-4H-furo[3,4-d][1,3]thiazin-2-yl)acetic acid
CAS Not listed
DKFLDACXFQGVEO-UHFFFAOYSA-N
0 defined, 3 unassigned centres

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.
04Possible N-nitroso structures
A record-level structural review indicates a possible N-nitroso candidate. This is not a confirmed impurity, formation prediction or analytical finding.
A structural result alone does not establish that a nitrosamine forms. A process-specific and analytical assessment is required.
05India 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 | NOT FOUND IN REVIEWED ENTRIES | CAS 178422-42-9 was not found in the reviewed exact-identity entries. Generic, class, analogue, salt and isomer provisions were not evaluated. |
|---|---|---|
| SCOMET | NOT FOUND IN REVIEWED CAS ENTRIES | CAS 178422-42-9 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
06Names and relationships
Associated parent compound
Cefdinir
View API and impurity familyOther names
- (2R)-2-((Z)-2-(2-Aminothiazol-4-yl)-2-(hydroxyimino)acetamido)2-((2RS,5RS)-5-methyl-7-oxo-2,4,5,7-tetrahydro-1H-furo(3,4-d)(1,3)thiazin-2-yl)acetic acid
- UNII-5U6BX3A1F6
- (2R)-2-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-hydroxyiminoacetyl]amino]-2-(5-methyl-7-oxo-1,2,4,5-tetrahydrofuro[3,4-d][1,3]thiazin-2-yl)acetic acid
- Cefdinir CP Impurity I&J&K&L
- Cefdinir USP Related Compound A
07Documented 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.
08Sources
- S01PubChem compound record, CID 71587584
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.
