Z(OMe)-Asn-Tyr-Cys(MBzl)-OMe

(S)-4-{(S)-2-Carbamoyl-1-[(S)-2-(4-hydroxy-phenyl)-1-methoxycarbonyl-ethylcarbamoyl]-ethylcarbamoyl}-4-(4-methoxy-benzyloxycarbonylamino)-butyric acid

(S)-2-((S)-2-Amino-3-carbamoyl-propionylamino)-3-(4-hydroxy-phenyl)-propionic acid methyl ester

Z(OMe)-Asn-Tyr-Cys(MBzl)-NHNH2