
Chemical identity
Ampicillin EP Impurity J
CAS 6489-58-3 · C13H20N2O4S
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-06263 |
|---|---|
| PubChem CID | 209820 |
| Name | Ampicillin EP Impurity J |
| CAS RN | 6489-58-3 |
| Molecular formula | C13H20N2O4S |
| Molecular weight | 300.4 g/mol |
| IUPAC name | (2S,5R,6R)-6-[(2,2-dimethylpropanoyl)amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid |
| InChIKey | PORWSLUULGTXGS-BKPPORCPSA-N |
02Structure identifiers

Structure facts for this exact identity.
| Molecular formula | C13H20N2O4S |
|---|---|
| InChIKey | PORWSLUULGTXGS-BKPPORCPSA-N |
| Ring count | 2 |
| Defined stereocentres | 3 |
| Unassigned stereocentres | 0 |
| SMILES | CC1([C@@H](N2[C@H](S1)[C@@H](C2=O)NC(=O)C(C)(C)C)C(=O)O)C |
|---|---|
| InChI | InChI=1S/C13H20N2O4S/c1-12(2,3)11(19)14-6-8(16)15-7(10(17)18)13(4,5)20-9(6)15/h6-7,9H,1-5H3,(H,14,19)(H,17,18)/t6-,7+,9-/m1/s1 |
03Stereochemistry
The published structure contains 3 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 | NOT FOUND IN REVIEWED ENTRIES | CAS 6489-58-3 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 6489-58-3 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
05Names and relationships
Associated parent compound
Ampicillin
View API and impurity familyOther names
- (2S,5R,6R)-6-((2,2-Dimethylpropanoyl)amino)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid
- UNII-6MM8IJ3O7L
- 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-pivalamido-
- Ampicillin trihydrate impurity J [EP]
- Ampicillin, anhydrous impurity J [EP]
- 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-((2,2-dimethyl-1-oxopropyl)amino)-3,3-dimethyl-7-oxo-, (2S,5R,6R)-
- 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-((2,2-dimethyl-1-oxopropyl)amino)-3,3-dimethyl-7-oxo-, (2S-(2alpha,5alpha,6beta))-
- AMPICILLIN TRIHYDRATE IMPURITY J [EP IMPURITY]
- AMPICILLIN, ANHYDROUS IMPURITY J [EP IMPURITY]
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 209820
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.
