Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 3,3-dimethyl-6-[2-(methyleneamino)-2-phenylacetamido]-7-oxo- (7CI,8CI);4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,3,3-dimethyl-6-[[(methyleneamino)phenylacetyl]amino]-7-oxo-, [2S-[2a,5a,6b(S*)]]-; D-(-)-a-(Methimino)benzylpenicillin; D-(-)-a-Methyleneaminobenzylpenicillin; Fedacilina;Metampicillin; Methylenampicillin; Micinovo; Pravacilin; Ruticina; Viderpen