S-benzyl-N-benzyloxycarbonyl-cysteinyl=>tyrosyl=>isoleucine ethyl ester
S-benzyl-N-benzyloxycarbonyl-cysteinyl=>tyrosyl=>isoleucyl=>glutaminyl=>asparagine
S-benzyl-N-[(benzyloxy)carbonyl]cysteinyltyrosine
S-benzyl-N-benzyloxycarbonyl-DL-cysteine benzylamide
S-benzyl-N-benzyloxycarbonyl-L-cysteine benzylamide