(6R,7R)-diphenylmethyl-3-methyl-7-phenoxyacetamidoceph-3-em-4-carboxylate, cephalosporin, cephalosporin(V) benhydryl ester, (6R)-3-methyl-8-oxo-7t-(2-phenoxy-acetylamino)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzhydryl ester, Diphenylmethyl (7S,6R)-7-(phenoxyacetamido)-3-methyl-3-cephem-4-carboxylate, diphenylmethyl (6R,7S)-7-(phenoxyacetamido)-3-methylceph-3-em-4-carboxylate, (6R,7R)-3-Methyl-8-oxo-7-(2-phenoxy-acetylamino)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzhydryl ester