3-Phthalidyl D-2-amino-2-phenylacetamidopenicillanic acid TALAMPICILLIN 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, 6-[(aminophenylacetyl)amino]-3,3-dimethyl-7-oxo-, 1,3-dihydro-3-oxo-1-isobenzofuranyl ester, [2S-[2a,5a,6b(S*)]]- 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, 6-[[(2R)-aminophenylacetyl]amino]-3,3-dimethyl-7-oxo-, 1,3-dihydro-3-oxo-1-isobenzofuranyl ester, (2S,5R,6R)- (9CI) Ampicillin phthalidyl ester (6R)-6-[[(R)-2-Amino-2-phenylacetyl]amino]penicillanic acid 1,3-dihydro-3-oxoisobenzofuran-1-yl ester C11751 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, 6-[[(2R)-2-amino-2-phenylacetyl]amino]-3,3-dimethyl-7-oxo-, 1,3-dihydro-3-oxo-1-isobenzofuranyl ester, (2S,5R,6R)-