Boc-Pro-Gly-Glu(Leu-Phe-Ala-NHNHZ)-Pro-Gly-O-t-Bu
phthalyl-Glu(Leu-Phe-Ala-NHNHZ)-Pro-Gly-O-t-Bu
({(S)-1-[(S)-2-Amino-4-((S)-1-{(S)-1-[(S)-2-(N'-benzyloxycarbonyl-hydrazino)-1-methyl-2-oxo-ethylcarbamoyl]-2-phenyl-ethylcarbamoyl}-3-methyl-butylcarbamoyl)-butyryl]-pyrrolidine-2-carbonyl}-amino)-acetic acid tert-butyl ester
Fmoc-Leu-Phe-Ala-NHNHZ
Leu-Phe-Ala-NHNHZ