N-Benzyloxycarbonyl-L-lysine benzyl ester p-toluenesulfonate , its cas register number 16964-83-3. It also can be called N6-[(Phenylmethoxy)carbonyl]-L-lysine phenylmethyl ester mono(4-methylbenzenesulfonate) ; and L-Lys(z)-Obzl TsOH .