2,2,2-trichloroethyl (2R,4S,6S,8S,10S)-(4,10-dihydroxy-10-methyl-8-{2-[1-(triisopropylsiloxy)-prop-2-(R)-yl]-allyl}-1,7-dioxaspiro[5.5]undec-2-yl)-acetate

(2R,4S,6S,8S,10S)-(4-(t-butyldimethylsiloxy)-10-hydroxy-10-methyl-8-{2-[1-(triisopropylsiloxy)-prop-2-(R)-yl]-allyl}-1,7-dioxaspiro[5.5]undec-2-yl)-acetic acid

2,2,2-trichloroethyl (2R,4S,6S,8S,10S)-(4-acetoxy-8-{2-[1-triethylsiloxy-prop-2-(R)-yl]-allyl}-10-methyl-10-(triethylsiloxy)-1,7-dioxaspiro[5.5]undec-2-yl)-acetate

Acetic acid (2S,4S,6R,8S,10S)-2-(2-benzyloxy-ethyl)-10-hydroxy-10-methyl-8-((R)-3-methyl-2-methylene-4-triisopropylsilanyloxy-butyl)-1,7-dioxa-spiro[5.5]undec-4-yl ester