InChI=1S/C20H20O8S/c1-20(11-27-29(23,24)25)7-6-16-17(28-20)5-4-15(19(16)22)13-8-12-2-3-14(21)9-18(12)26-10-13/h2-7,9,13,21-22H,8,10-11H2,1H3,(H,23,24,25)