Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 3,3-dimethyl-7-oxo-6-[2-phenyl-2-(sulfoamino)acetamido]-, D- (8CI);4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,3,3-dimethyl-7-oxo-6-[[(2R)-phenyl(sulfoamino)acetyl]amino]-, (2S,5R,6R)-(9CI); 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,3,3-dimethyl-7-oxo-6-[[phenyl(sulfoamino)acetyl]amino]-, [2S-[2a,5a,6b(S*)]]-; 6-(D-a-Sulfoaminophenylacetamido)penicillanic acid; Suncillin