(R)-4-[5-((E)-(1R,4S,5R)-8-Azido-5-ethyl-4-hydroxy-1-methyl-oct-2-enyl)-2,2-dimethyl-4,6-dioxo-[1,3]dioxan-5-yl]-2-ethyl-butyric acid benzyl ester

(R)-4-{5-[(E)-(1R,4S,5R)-8-Azido-4-(tert-butyl-dimethyl-silanyloxy)-5-ethyl-1-methyl-oct-2-enyl]-2,2-dimethyl-4,6-dioxo-[1,3]dioxan-5-yl}-2-ethyl-butyric acid benzyl ester

(R)-4-(2,2-Dimethyl-4,6-dioxo-[1,3]dioxan-5-yl)-2-ethyl-butyric acid benzyl ester

(4R,5S)-1-((R)-5-Azido-2-ethyl-pentanoyl)-3,4-dimethyl-5-phenyl-imidazolidin-2-one

(S)-2-Ethyl-hex-5-enoic acid [(4R,5R)-5-(tert-butyl-dimethyl-silanyloxy)-4-ethyl-8-methyl-non-8-enyl]-amide