Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 6-[(aminophenylacetyl)amino]-3,3-dimethyl-7-oxo-,1-[(ethoxycarbonyl)oxy]ethyl 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-[(ethoxycarbonyl)oxy]ethyl ester, (2S,5R,6R)- (9CI);Carampicillin;1-[(ethoxycarbonyl)oxy]ethyl (2S,5R,6R)-6-{[(2R)-2-amino-2-phenylacetyl]amino}-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate;(2S,5R,6R)-6-[(R)-(2-amino-2-phenylacetamido)]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid Ester with Ethyl 1-Hydroxyethylcarbonate;[2S-[2a,5a,6b(S*)]]-6-[(Aminophenylacetyl)amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid 1-[(Ethoxycarbonyl)oxy]ethyl Ester;1-[(Ethoxycarbonyl)oxy]ethyl (2S,5R,6R)-6-{[(2R)-2-amino-2-phenylacetyl]amino}-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate;1'-Ethoxycarbonyloxyethyl 6-(D-a-Aminophenylacetamido)penicillanate;