InChI=1S/C20H16O9S/c1-20(9-26-30(23,24)25)7-6-12-14(29-20)5-4-13-16-18(28-17(12)13)11-3-2-10(21)8-15(11)27-19(16)22/h2-5,8,21H,6-7,9H2,1H3,(H,23,24,25)