N-(O-ethyl-N-benzyloxycarbonyl-L-α-glutamyl)-L-tyrosine methyl ester
N-(N-benzyloxycarbonyl-L-α-glutamyl)-L-tyrosine ethyl ester
N-(N-benzyloxycarbonyl-O-methyl-L-α-glutamyl)-L-tyrosine methyl ester
Benzyloxycarbonyl-L-pyroglutamyl-L-tyrosinethylester
(S)-2-Benzyloxycarbonylamino-pentanedioic acid 5-methyl ester