(R)-3-{(E)-(2R,3S)-5-[(2R,4R,5R)-5-Allyl-2-[4-(tert-butyl-dimethyl-silanyloxy)-phenyl]-4-(2-trityloxy-ethyl)-[1,3]dioxolan-4-yl]-2-ethyl-3-triethylsilanyloxy-pent-4-enoyl}-4-benzyl-oxazolidin-2-one

2-((2R,4R,5R)-2-(4-((tert-butyldimethylsilyl)oxy)phenyl)-5-((E)-2-((2S,3S)-3-ethyl-6-oxo-3,6-dihydro-2H-pyran-2-yl)vinyl)-5-(2-(trityloxy)ethyl)-1,3-dioxolan-4-yl)acetaldehyde

(5S,6S)-6-((E)-2-{(2R,4R,5R)-2-(4-{[tert-butyl(dimethyl)silyl]oxy}phenyl)-5-(2,3-dihydroxypropyl)-4-[2-(trityloxy)ethyl]-[1,3]dioxolan-4-yl}vinyl)-5-ethyl-5,6-dihydro-2H-pyran-2-one