(2S,6S,7S,8S)-1-Benzyloxy-9-(tert-butyl-dimethyl-silanyloxy)-7-methoxymethoxy-2,6,8-trimethyl-non-4-yn-3-one

(2S,3R,6S,7S,8S)-1-Benzyloxy-9-(tert-butyl-dimethyl-silanyloxy)-7-methoxymethoxy-2,6,8-trimethyl-non-4-yn-3-ol