Synonyms: Cysteine,benzyl carbonate (ester), L- (6CI,7CI,8CI); L-Cysteine, phenylmethyl carbonate(ester) (9CI); Carbonic acid, thio-, O-benzyl ester, S-ester with L-cysteine(7CI,8CI); NSC 88493; S-CBz-L-cysteine; S-Carbobenzoxy-cysteine;S-Carbobenzoxycysteine; S-Carbobenzyloxy-L-cysteine; S-Carboxybenzyl-L-cysteine