rac-5-((tert-butyldiphenylsilyl)oxy)-1-((3aR,3bS,6aR,6bS,7R,10aR,10bR)-5-methoxy-7-((4-methoxybenzyl)oxy)-2,2,3b,6b,10,10-hexamethyloctahydronaphtho[1,2-d:3,4-d']bis([1,3]dioxole)-6a(3bH)-yl)pent-2-yn-1-one

rac-5-((tert-butyldiphenylsilyl)oxy)-1-((3aR,3bS,6aR,6bS,7R,10aR,10bR)-5-methoxy-7-((4-methoxybenzyl)oxy)-2,2,3b,6b,10,10-hexamethyloctahydronaphtho[1,2-d:3,4-d']bis([1,3]dioxole)-6a(3bH)-yl)-3-methylpent-2-en-1-one

(3aR,3bS,5S,7aR,7bS,8R,11aR,11bR)-7a,8-dihydroxy-2,2,3b,5,7b,11,11-heptamethyl-5-vinyldodecahydro-7H-benzo[f][1,3]dioxolo[4,5-h]chromen-7-one