7-(bromacetamido)-7-methoxy-3-[(1-methyl-1H-tetrazol-5-yl)lsulfanyl]methyl-3,4-didehydrocepham-4-carboxylsyre
7-(bromoacetamido)-7-methoxy-3-[(1-methyl-1H-tetrazol-5-yl)lsulfanyl]methyl-3,4-didehydrocepham-4-carboxylic acid