(4S,5S)-5-tert-Butoxycarbonylamino-4-hydroxy-6-methyl-heptanoic acid ethyl ester

(E)-(S)-4-[(2R,4S,5S)-5-tert-Butoxycarbonylamino-4-(tert-butyl-dimethyl-silanyloxy)-6-methyl-2-(3-methyl-but-2-enyl)-heptanoylamino]-5-((S)-2-oxo-pyrrolidin-3-yl)-pent-2-enoic acid ethyl ester

(2R,4S,5S)-2-Benzyl-5-tert-butoxycarbonylamino-4-(tert-butyl-dimethyl-silanyloxy)-6-methyl-heptanoic acid

tert-butyl (S)-1-((2S,4R)-tetrahydro-4-(3-methylbut-2-enyl)-5-oxofuran-2-yl)-2-methylpropylcarbamate

(2R,4S,5S)-5-tert-Butoxycarbonylamino-4-hydroxy-6-methyl-2-(3-methyl-but-2-enyl)-heptanoic acid

(E)-(S)-4-{(2R,4S,5S)-4-(tert-Butyl-dimethyl-silanyloxy)-6-methyl-2-(3-methyl-but-2-enyl)-5-[(5-methyl-isoxazole-3-carbonyl)-amino]-heptanoylamino}-5-((S)-2-oxo-pyrrolidin-3-yl)-pent-2-enoic acid ethyl ester

(E)-(S)-4-{(2R,4S,5S)-4-Hydroxy-6-methyl-2-(3-methyl-but-2-enyl)-5-[(5-methyl-isoxazole-3-carbonyl)-amino]-heptanoylamino}-5-((S)-2-oxo-pyrrolidin-3-yl)-pent-2-enoic acid ethyl ester

tert-butyl (S)-1-((2S,4R)-4-benzyltetrahydro-5-oxofuran-2-yl)-2-methylpropylcarbamate

(E)-(S)-4-{(2R,4S,5S)-2-Benzyl-4-hydroxy-6-methyl-5-[(5-methyl-isoxazole-3-carbonyl)-amino]-heptanoylamino}-5-((S)-2-oxo-pyrrolidin-3-yl)-pent-2-enoic acid ethyl ester

(E)-(S)-4-[(2R,4S,5S)-2-Benzyl-5-tert-butoxycarbonylamino-4-(tert-butyl-dimethyl-silanyloxy)-6-methyl-heptanoylamino]-5-((S)-2-oxo-pyrrolidin-3-yl)-pent-2-enoic acid ethyl ester