InChI=1S/C20H22O8S/c1-26-20-10-13-4-2-3-5-15(21)12-18(28-29(23,24)25)14-7-8-16(22)19(11-14)27-17(20)9-6-13/h6-11,18,22H,2-5,12H2,1H3,(H,23,24,25)