Chemical Name: (2S,3aS,6aS)-1-(((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)-D-alanyl)octahydrocyclopenta[b]pyrrole-2-carboxylic acid
Synonym: Ampicillin USP related compound A ; 6-Aminopenicillanic Acid
Smile: O=C([C@@H]1C[C@@](CCC2)([H])[C@@]2([H])N1C([C@H](N[C@H](C(OCC)=O)CCC3=CC=CC=C3)C)=O)O