(2R,3S,4S)-3-(tert-butyldimethylsiloxy)-2,4-dimethyl-7-trimethylsilylhept-6-ynal

(2R,3S,4S)-3-(tert-butyldimethylsiloxy)-2,4-dimethyl-6-oxohexyl 2,2-dimethylpropionate

(3S,4S,5R)-4-(tert-Butyl-dimethyl-silanyloxy)-6-(2,2-dimethyl-propionyloxy)-3,5-dimethyl-hexanoic acid methyl ester

(E)-(6R,7S,8S)-7-(tert-Butyl-dimethyl-silanyloxy)-2,2-dimethoxy-4,6,8-trimethyl-11-trimethylsilanyl-undec-4-en-10-ynoic acid