Ampicillin EP Impurity B

Chemical Name: (2S,5R,6R)-6-[[(2S)-2-amino-2-phenylacetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid (as per EP) (2S,5R,6R)-6-[(S)-2-Amino-2-phenylacetamido]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid (as per USP)

Synonym: N-Desacetyl Ketonazole

Smile: O=C([C@@H](C(C)(C)S[C@]1([H])[C@@H]2NC([C@@H](N)C3=CC=CC=C3)=O)N1C2=O)O