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

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

(2S,4S,6R,8S,10S)-8-(2-hydroxyethyl)-10-(t-butyldimethylsiloxy)-4-methyl-2-{2-[1-(triisopropylsiloxy)-prop-2-(R)-yl]-allyl}-1,7-dioxaspiro[5.5]undecan-4-ol

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