1-((2S,4S,6S,8R,10S)-8-Benzyloxymethyl-10-hydroxy-4-methoxy-1,7-dioxa-spiro[5.5]undec-2-yl)-butan-2-one

1-[(2S,4S,6R,8R,10S)-8-Benzyloxymethyl-10-(tert-butyl-dimethyl-silanyloxy)-4-methoxy-1,7-dioxa-spiro[5.5]undec-2-yl]-butan-2-one

(2S,4R)-1-{2-[(2S,4R)-5-Benzyloxy-2,4-bis-(tert-butyl-dimethyl-silanyloxy)-pentyl]-[1,3]dithian-2-yl}-4-(tert-butyl-dimethyl-silanyloxy)-6-methylene-octan-2-ol

2-[(2S,4R)-5-Benzyloxy-2,4-bis-(tert-butyl-dimethyl-silanyloxy)-pentyl]-2-[(2S,4R)-4-(tert-butyl-dimethyl-silanyloxy)-2-methoxy-6-methylene-octyl]-[1,3]dithiane