[(2R,4S,6S,8S,10S)-4-Acetoxy-10-methyl-8-((R)-3-methyl-2-methylene-4-oxo-butyl)-10-triethylsilanyloxy-1,7-dioxa-spiro[5.5]undec-2-yl]-acetic acid allyl ester

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

{(2S,4S,6R,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-yl}-acetonitrile

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

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