Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 6-[(amino-1,4-cyclohexadien-1-ylacetyl)amino]-3,3-dimethyl-7-oxo-, [2S-[2a,5a,6b(S*)]]-; 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,6-[2-amino-2-(1,4-cyclohexadien-1-yl)acetamido]-3,3-dimethyl-7-oxo-, D- (8CI);4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,6-[[(2R)-amino-1,4-cyclohexadien-1-ylacetyl]amino]-3,3-dimethyl-7-oxo-,(2S,5R,6R)- (9CI);6-[D-2-Amino-2-(1,4-cyclohexadien-1-yl)acetamido]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid; 6-[D-2-Amino-2-(1,4-cyclohexadienyl)acetamido]penicillanic acid;D-2-Amino-2-(1,4-cyclohexadien-1-yl)acetamidopenicillanic acid; Dexacilina;Dexacillin; Dihydroampicillin; Epicillin; SQ 11302; Spectacillin