(4R,6S)-4-Iodomethyl-6-[(S)-2-(4-methoxy-benzyloxy)-1-methyl-ethyl]-[1,3]dioxan-2-one

(E)-(S)-5-(tert-Butyl-dimethyl-silanyloxy)-6-[(2R,6S)-6-((2S,3R)-2-methoxy-3-methyl-4-oxo-butyl)-5,6-dihydro-2H-pyran-2-yl]-2-methyl-hex-2-enoic acid methyl ester

(E)-(S)-5-(tert-Butyl-dimethyl-silanyloxy)-6-[(2R,6S)-6-((2S,3S)-4-hydroxy-2-methoxy-3-methyl-butyl)-5,6-dihydro-2H-pyran-2-yl]-2-methyl-hex-2-enoic acid methyl ester