(2-((2S,3aS,5aS,9aS,9bS)-5a,9b-dimethyldecahydro-2H-spiro[naphtho[2,1-b]furan-6,2'-[1,3]dioxolan]-2-yl)ethyl)trimethylsilane

1-((4aS,5S,6S,8aS)-6-hydroxy-5,8a-dimethyloctahydro-2H-spiro[naphthalene-1,2'-[1,3]dioxolan]-5-yl)but-3-yn-2-one

1-((4aS,5S,6S,8aS)-6-hydroxy-5,8a-dimethyloctahydro-2H-spiro[naphthalene-1,2'-[1,3]dioxolan]-5-yl)-4-(trimethylsilyl)but-3-yn-2-one

1-((4aS,5S,6S,8aS)-6-hydroxy-5,8a-dimethyloctahydro-2H-spiro[naphthalene-1,2'-[1,3]dioxolan]-5-yl)-4-(triethylsilyl)but-3-yn-2-one

(((2S,3aS,5aS,9aS,9bS)-5a,9b-dimethyldecahydro-2H-spiro[naphtho[2,1-b]furan-6,2'-[1,3]dioxolan]-2-yl)ethynyl)triethylsilane