Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 3,3-dimethyl-7-oxo-, 4,4-dioxide, sodium salt, (2S,5R)- (9CI);Penicillanic acid 1,1-dioxidesodium salt;Sodium 1,1-dioxypenicillanate;Sodium penicillanate 1,1-dioxide;Sodium sulbactam;Sulbactam sodium salt;Unasyn IM;