{(2R,4S,6S,8S,10S)-4-Acetoxy-8-[(R)-4-(tert-butyl-dimethyl-silanyloxy)-3-methyl-2-methylene-butyl]-10-hydroxy-10-methyl-1,7-dioxa-spiro[5.5]undec-2-yl}-acetic acid allyl ester

Toluene-4-sulfonic acid (2R,4S,6S,8S,10S)-8-[(R)-4-(tert-butyl-dimethyl-silanyloxy)-3-methyl-2-methylene-butyl]-4,10-dihydroxy-10-methyl-1,7-dioxa-spiro[5.5]undec-2-ylmethyl ester

(8S,10R,12S,15S)-15-[(R)-4-(tert-Butyl-dimethyl-silanyloxy)-3-methyl-2-methylene-butyl]-10-(4-methoxy-benzyloxymethyl)-9,14-dioxa-1,5-dithia-dispiro[5.1.5.3]hexadecan-12-ol

(2R,6S,8R,10S)-10-(tert-Butyl-dimethyl-silanyloxy)-2-[(R)-4-(tert-butyl-dimethyl-silanyloxy)-3-methyl-2-methylene-butyl]-8-(4-methoxy-benzyloxymethyl)-1,7-dioxa-spiro[5.5]undecan-4-one

(2R,4S,6R,8R,10S)-4-(tert-Butyl-dimethyl-silanyloxy)-8-[(R)-4-(tert-butyl-dimethyl-silanyloxy)-3-methyl-2-methylene-butyl]-10-methoxy-2-(4-methoxy-benzyloxymethyl)-1,7-dioxa-spiro[5.5]undecane