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

(2S,3S)-2-Benzyloxycarbonylamino-3-methyl-pent-4-enoic acid methyl ester

(2S,3S)-2-Benzyloxycarbonylamino-3-methyl-5-triisopropylsilanyloxy-pentanoic acid methyl ester