(2S,7S,8R,9S,12R)-4-Benzenesulfonyl-7,9-bis-(tert-butyl-dimethyl-silanyloxy)-12-(tert-butyl-dimethyl-silanyloxymethyl)-2-((4S,6R)-2,2-di-tert-butyl-6-methyl-[1,3,2]dioxasilinan-4-yl)-8-methyl-tetradecan-5-ol

(R)-4-ethyl-5-<(tert-butyldimethylsilyl)oxy>pentanal