(S)-2-({(2S,4R)-2-[(S)-2-[((S)-2-tert-Butoxycarbonylamino-4-methyl-pentanoyl)-methyl-amino]-3-(1-methoxy-1H-indol-3-yl)-propionylamino]-4-methyl-octanoyl}-methyl-amino)-propionic acid

(S)-2-{[(2S,4R)-2-((S)-4-Cyano-2-hydroxy-butyrylamino)-4-methyl-octanoyl]-methyl-amino}-propionic acid tert-butyl ester

N-<(2S,4R)-2--4-methylheptanoyl>-N-methyl-L-alanine methyl ester

(S)-2-[((2S,4R)-2-tert-Butoxycarbonylamino-4-methyl-octanoyl)-methyl-amino]-propionic acid tert-butyl ester

(S)-3-(1-Methoxy-1H-indol-3-yl)-2-methylamino-propionic acid methyl ester