(2S,3R,9S,10R)-1-Benzyloxy-12-(tert-butyl-dimethyl-silanyloxy)-3,9-dimethyl-2,10-bis-triethylsilanyloxy-dodecan-6-one

tert-Butyl-[2-((2R,3S,6S,8S,9R)-8-ethynyl-3,9-dimethyl-1,7-dioxa-spiro[5.5]undec-2-yl)-ethoxy]-dimethyl-silane