1,5-dioxaspiro[5.5]undecane, 7,11-dibromo-3,3-dimethyl- 7,11-dibromo-3,3-dimethyl-1,5-dioxaspiro[5.5]undecane InChI=1/C11H18Br2O2/c1-10(2)6-14-11(15-7-10)8(12)4-3-5-9(11)13/h8-9H,3-7H2,1-2H