Synonyms: 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 3,3-dimethyl-7-oxo-6-(2-phenoxyacetamido)-, diphenylmethyl ester, 4-oxide(8CI); 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,3,3-dimethyl-7-oxo-6-[(phenoxyacetyl)amino]-, diphenylmethyl ester, 4-oxide, [2S-(2a,5a,6b)]-; Penicillin V, diphenylmethyl ester, S-oxide (7CI); Benzhydrol,3,3-dimethyl-7-oxo-6-(2-phenoxyacetamido)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate4-oxide