Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 3,3-dimethyl-7-oxo-6-(2-phenoxy-2-phenylacetamido)- (7CI,8CI);4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,3,3-dimethyl-7-oxo-6-[(phenoxyphenylacetyl)amino]-, (2S,5R,6R)- (9CI);4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,3,3-dimethyl-7-oxo-6-[(phenoxyphenylacetyl)amino]-, [2S-(2a,5a,6b)]-; (Phenoxybenzyl)penicillin;3,3-Dimethyl-7-oxo-6-(2-phenoxy-2-phenylacetamido)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid; Penicillin, (phenoxyphenylmethyl)-; Phenbenicillin; a-Phenoxybenzylpenicillin