7-(alpha-(2-aminomethylphenyl)acetamido)-3-((1-carboxymethyltetrazol-5-ylthio)methyl)-3-cephem-4-carboxylic acid
7β-[2-(aminomethyl)phenyl]acetamido-3-{[1-(carboxymethyl)-1H-tetrazol-5-yl]sulfanyl}methyl-3,4-didehydrocepham-4-carboxylic acid