(2S,3S)-2-(benzyloxycarbonylamino)-3-methylpent-4-enoic acid

(2S,3S)-2-{[(benzyloxy)carbonyl]amino}-5-hydroxy-3-methylpentanoic acid methyl ester

(2S,3S)-2-Benzyloxycarbonylamino-3-cyclopropyl-butyric acid benzyl ester

(2S,3S)-2-[N-(tert-butoxycarbonyl)-N-methylamino]-3-methyl-5-[(triisopropylsilanyl)oxy]pentanoic acid methyl ester

(2S,3S)-2-({(R)-2-[1-(9H-Fluoren-9-ylmethoxycarbonylamino)-ethyl]-4-methyl-4,5-dihydro-thiazole-4-carbonyl}-methyl-amino)-3-methyl-5-triisopropylsilanyloxy-pentanoic acid allyl ester

3-{2-[2-({2-[1-(9H-fluoren-9-ylmethoxycarbonylamino)-ethyl]-4-methyl-4,5-dihydro-thiazole-4-carbonyl}-methyl-amino)-3-methyl-5-triisopropylsilanyloxy-pentanoylamino]-propionyloxy}-7-methoxy-2,2,4-trimethyl-decanoic acid allyl ester