InChI=1S/C21H26O9S/c1-11-15-10-16(19(27-4)12(2)30-31(23,24)25)17(22)21(28-5)20(15)29-18(11)13-7-6-8-14(9-13)26-3/h6-12,18-19,22H,1-5H3,(H,23,24,25)