(6R-trans)-7-(((2-(Aminomethyl)phenyl)acetyl)amino)-3-(((1-(carboxymethyl)-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic Acid
7-(alpha-(2-aminomethylphenyl)acetamido)-3-((1-carboxymethyltetrazol-5-ylthio)methyl)-3-cephem-4-carboxylic acid