(8S,9S,11R)-8-((E)-(S)-4-Benzyloxymethoxy-1-methyl-but-2-enyl)-9,11-dimethyl-7-oxa-1,5-dithia-spiro[5.5]undecane

((E)-3-Benzyloxymethoxy-1-bromo-propenyl)-trimethyl-silane