Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 3,3-dimethyl-7-oxo-6-(2-phenoxypropionamido)- (7CI,8CI);4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,3,3-dimethyl-7-oxo-6-[(1-oxo-2-phenoxypropyl)amino]-, [2S-(2a,5a,6b)]-; 1-Phenoxyethylpenicillin; Alfacilin; Feneticillin; NSC 117548;Optipen; Penicillin 152; Penicillin MV; Peniplus; Penorale; Penova;Phenethicillin; Pheneticillin; Phenoxy PC; Phenoxyethylpenicillin; Synthepen; a-Phenoxyethylpenicillin