InChI=1S/C17H22O6S/c1-13(2)11-16(23-24(19,20)21)12-14(3)9-10-22-17(18)15-7-5-4-6-8-15/h4-9,11,16H,10,12H2,1-3H3,(H,19,20,21)/b14-9-