(R)-1-(Benzyl-dimethyl-silanyl)-6,6-diethoxy-5-hydroxy-hept-1-yn-3-one

(3R,5R)-1-(Benzyl-dimethyl-silanyl)-6,6-diethoxy-hept-1-yne-3,5-diol

(3R,5R)-7-(Benzyl-dimethyl-silanyl)-5-(tert-butyl-dimethyl-silanyloxy)-3-hydroxy-hept-6-yn-2-one

(E)-(3R,5R,6R,9R)-1-(Benzyl-dimethyl-silanyl)-3-(tert-butyl-dimethyl-silanyloxy)-5-(3,4-dimethoxy-benzyloxymethoxy)-6-methyl-9-triethylsilanyloxy-dodeca-7,11-dien-1-yn-6-ol

4-(benzyldimethylsilyl)but-3-yn-2-one