(6S,9R)-1-{(4R,6S)-6-[2-(p-methoxybenzyloxy)ethyl]-2,2-dimethyl[1,3]dioxan-4-yl}-9-methyl-8-methylene-6,10-bis(triethylsilanyloxy)dec-3-yn-2-ol

acetic acid (2S,4S,6R,8S,10S)-8-[(3R)-4-(tert-butyldimethylsilanyloxy)-3-methyl-2-methylenebutyl]-2-[2-(p-methoxybenzyloxy)ethyl]-10-methyl-10-(triethylsilanyloxy)-1,7-dioxaspiro[5.5]undec-4-yl ester

1-{(4S,6S)-6-[2-(p-methoxybenzyloxy)ethyl]-2,2-dimethyl[1,3]dioxan-4-yl}-3-[2-[(2S,5R)-5-methyl-4-methylene-2,6-bis(triethylsilanyloxy)hexyl][1,3]dithian-2-yl]propan-2-one