tBOC-Gly-ΔPhe-(S)-Leu-OMe

({(S)-1-[(S)-3-Methyl-1-(N'-phenyl-hydrazinocarbonyl)-butylcarbamoyl]-2-phenyl-ethylcarbamoyl}-methyl)-carbamic acid tert-butyl ester

Boc-Gly-D-Phe-Leu-NH2

L-Leucinamide, N-[(1,1-dimethylethoxy)carbonyl]glycyl-L-phenylalanyl-