Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 6-(2-amino-2-phenylacetamido)-3,3-dimethyl-7-oxo-, trihydrate, D-(-)-(8CI);4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,6-[(aminophenylacetyl)amino]-3,3-dimethyl-7-oxo-, trihydrate, [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-, trihydrate, (2S,5R,6R)-(9CI);Aminobenzylpenicillin trihydrate;Polycillin;[D-(-)-a-Aminobenzyl]penicillin trihydrate;a-Aminobenzylpenicillintrihydrate;