(3S,4R,5S,6S)-5-Benzyloxy-1,7-bis-(tert-butyl-diphenyl-silanyloxy)-4,6-dimethyl-heptan-3-ol

(4S,5S,6S)-5-Benzyloxy-1,7-bis-(tert-butyl-diphenyl-silanyloxy)-4,6-dimethyl-heptan-3-one