dimethyl 2-(3-methylbut-2-enyl)-2-((2,2,5,5-tetramethyl-2,5-dihydro-1,2,5-oxadisilol-3-yl)methyl)malonate

5-methylhex-4-enyl bromide

dimethyl <4'-acetoxy-2'-bromo-(2'Z)-butenyl><3''-methyl-2''-butenyl>malonate