7,7-dimethyl-6,8-dioxaspiro[3.5]non-2-yl 4-bromobenzenesulfonate InChI=1/C15H19BrO5S/c1-14(2)19-9-15(10-20-14)7-12(8-15)21-22(17,18)13-5-3-11(16)4-6-13/h3-6,12H,7-10H2,1-2H benzenesulfonic acid, 4-bromo-, 7,7-dimethyl-6,8-dioxaspiro[3.5]non-2-yl ester