(S)-2-((R)-(benzyloxy)((R)-2,2-diethyl-1,3-dioxolan-4-yl)methyl)but-3-yne-1,2-diol

(S)-2-((R)-(benzyloxy)((R)-2,2-diethyl-1,3-dioxolan-4-yl)methyl)-4-(trimethylsilyl)but-3-yne-1,2-diol

(R)-3-((R)-(benzyloxy)((R)-2,2-diethyl-1,3-dioxolan-4-yl)methyl)-2-ethoxy-5-(trimethylsilyl)pent-1-en-4-yn-3-ol

(R)-2-[(R)-Benzyloxy-((R)-2,2-diethyl-[1,3]dioxolan-4-yl)-methyl]-2-hydroxy-4-trimethylsilanyl-but-3-ynoic acid ethyl ester

(R)-4-[(1R,2S)-1-Benzyloxy-2-(tert-butyl-dimethyl-silanyloxymethyl)-2-trimethylsilanyloxy-but-3-ynyl]-2,2-diethyl-[1,3]dioxolane