(2S,3S)-2-Benzyloxy-3-(1-methoxy-1-methyl-ethoxy)-butane-1,4-diol

(2R,3R,8R,9S)-9-Benzyloxy-2,8-bis-(tert-butyl-dimethyl-silanyloxy)-1-(4-methoxy-benzyloxy)-undec-5-yn-3-ol