(4aR,4'R,8R,8aR)-2,2-di-tert-butyl-4'-((E)-4-methoxybut-2-en-1-yl)-8-((triisopropylsilyl)oxy)tetrahydro-4H-spiro[pyrano[3,2-d][1,3,2]dioxasiline-6,2'-[1,3]dioxolane]

(4aR,8R,8aR)-2,2-Di-tert-butyl-6-((R)-1-hydroxymethyl-but-3-enyloxy)-8-triisopropylsilanyloxy-hexahydro-1,3,5-trioxa-2-sila-naphthalene-6-carbonitrile

(4aR,8R,8aR)-2,2-Di-tert-butyl-6-((E)-(R)-1-hydroxymethyl-5-methoxy-pent-3-enyloxy)-8-triisopropylsilanyloxy-hexahydro-1,3,5-trioxa-2-sila-naphthalene-6-carbonitrile

(4aR,8R,8aR)-2,2-Di-tert-butyl-6-[(R)-1-(tert-butyl-dimethyl-silanyloxymethyl)-but-3-enyloxy]-8-triisopropylsilanyloxy-hexahydro-1,3,5-trioxa-2-sila-naphthalene-6-carbonitrile

(4aR,8R,8aR)-2,2-Di-tert-butyl-6-[(E)-(R)-1-(tert-butyl-dimethyl-silanyloxymethyl)-5-methoxy-pent-3-enyloxy]-8-triisopropylsilanyloxy-hexahydro-1,3,5-trioxa-2-sila-naphthalene-6-carbonitrile