methyl (2S,4R)-4-{[(2-{(1R,3R)-1-acetoxy-4-methyl-3-[(N-{[(2R)-1-methylpiperidin-2-yl]carbonyl}-L-isoleucyl)amino]pentyl}-1,3-thiazol-4-yl)carbonyl]amino}-2-methyl-5-phenylpentanoate

4-({2-[1-acetoxy-3-(2-amino-3-methyl-pentanoylamino)-4-methyl-pentyl]-thiazole-4-carbonyl}-amino)-2-methyl-5-phenyl-pentanoic acid methyl ester

(2S,4R)-4-((tert-butoxycarbonyl)amino)-2-methyl-5-phenylpentanoic acid