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

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

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

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

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