Z(OMe)-Gly-Phe-Met(O)-OBzl

Z(OMe)-Gly-Gly-Phe-Met(O)-OBzl

methyl ester of N,O-di-t-butyloxycarbonyl-L-tyrosylglycylglycyl-L-phenylalanyl-L-methionine

Phe-Hcy(Bzl)-OBzl*HCl

Boc-Tyr(Cl2Bzl)-Gly-Gly-Phe-Met(O)-OBzl