InChI=1S/C17H22O6S/c1-3-5-6-7-12-17(23-24(20,21)22)14-13-16(19)11-9-8-10-15(18)4-2/h13-14,17H,3-7,12H2,1-2H3,(H,20,21,22)/b14-13+