(S)-2-((S)-4-Benzyloxycarbonyl-2-{(S)-4-benzyloxycarbonyl-2-[2-((S)-2-tert-butoxycarbonylamino-3-phenyl-propionylamino)-acetylamino]-butyrylamino}-butyrylamino)-4-methyl-pentanoic acid methyl ester

Boc-Phe-Gly-Glu-Glu-Leu-OMe

(S)-2-((S)-4-Benzyloxycarbonyl-2-{(S)-4-benzyloxycarbonyl-2-[(S)-2-((S)-2-tert-butoxycarbonylamino-3-phenyl-propionylamino)-propionylamino]-butyrylamino}-butyrylamino)-4-methyl-pentanoic acid methyl ester

Boc-Phe-Leu-D-Glu-Glu-Leu-OMe

N-(tert-butoxycarbonyl)-L-phenylalanyl-L-leucyl-L-glutamyl-L-glutamyl-L-leucine methyl ester