3-((3aS,6R,7aS)-3a-(3-((tert-butyldimethylsilyl)oxy)propyl)-6-methyl-1,3a,5,6,7,7a-hexahydrospiro[indene-4,2'-[1,3]dioxolan]-3-yl)propan-1-ol

(3aS,6R,7aS)-3a-(3-hydroxypropyl)-6-methyl-1,3a,5,6,7,7a-hexahydrospiro[indene-4,2'-[1,3]dioxolan]-3-yl trifluoromethanesulfonate

(3aS,6R,7aS)-3a-(3-((tert-butyldimethylsilyl)oxy)propyl)-6-methyl-1,3a,5,6,7,7a-hexahydrospiro[indene-4,2'-[1,3]dioxolan]-3-yl trifluoromethanesulfonate

(3-((3aS,6R,7aS)-3-allyl-6-methyl-5,6,7,7a-tetrahydrospiro[indene-4,2'-[1,3]dioxolan]-3a(1H)-yl)propoxy)(tert-butyl)dimethylsilane

(2R,3R,3aS,6R,7aS)-3a-(3-((tert-butyldimethylsilyl)oxy)propyl)-3-(3-hydroxypropyl)-6-methyloctahydrospiro[indene-4,2'-[1,3]dioxolan]-2-ol