2,2-Dimethyl-propionic acid (2S,4S,6R,8R,10S)-10-(tert-butyl-dimethyl-silanyloxy)-4-methoxy-8-triethylsilanyloxymethyl-1,7-dioxa-spiro[5.5]undec-2-ylmethyl ester

{(2R,4S,6R,8S,10S)-8-[(2R,3R,4R,5S)-6-Benzenesulfonyl-2-benzyloxymethoxy-4-(3,4-dimethoxy-benzyloxy)-3,5-dimethyl-hexyl]-2-benzyloxymethyl-10-methoxy-1,7-dioxa-spiro[5.5]undec-4-yloxy}-tert-butyl-dimethyl-silane

{(2R,4S,6R,8S,10S)-8-[(2R,3R,4R,5S)-2-Benzyloxymethoxy-4-(3,4-dimethoxy-benzyloxy)-6-iodo-3,5-dimethyl-hexyl]-2-benzyloxymethyl-10-methoxy-1,7-dioxa-spiro[5.5]undec-4-yloxy}-tert-butyl-dimethyl-silane

(2R,3S,4R,5R)-5-Benzyloxymethoxy-6-[(2S,4S,6R,8R,10S)-8-benzyloxymethyl-10-(tert-butyl-dimethyl-silanyloxy)-4-methoxy-1,7-dioxa-spiro[5.5]undec-2-yl]-3-(3,4-dimethoxy-benzyloxy)-2,4-dimethyl-hexan-1-ol

[(2R,4S,6R,8S,10S)-2-Benzyloxymethyl-8-(2-{(S)-1-[(4S,5R)-2-(3,4-dimethoxy-phenyl)-5-methyl-[1,3]dioxan-4-yl]-ethyl}-[1,3]dithian-2-ylmethyl)-10-methoxy-1,7-dioxa-spiro[5.5]undec-4-yloxy]-tert-butyl-dimethyl-silane