Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 3,3-dimethyl-7-oxo-, 4,4-dioxide, (2S-cis)-;Betamaze;CP 45899;Penicillanic acid 1,1-dioxide;Penicillanic acid S,S-dioxide;Penicillanic aciddioxide;Penicillanic acid sulfone;Sulbactam;Piperacillin Sodium and Sulbactam Sodium (1:8);Sulbactam Acid;