(2R,3R)-2-Benzyloxy-3-(1-methoxy-1-methyl-ethoxy)-succinic acid diethyl ester

Methanesulfonic acid (1S,2S)-2-benzyloxy-1-(tert-butyl-dimethyl-silanyloxymethyl)-butyl ester

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