InChI=1S/C20H20O8S/c1-12(11-27-29(23,24)25)3-6-16-17(8-15(22)10-19(16)26-2)20-7-13-4-5-14(21)9-18(13)28-20/h3-5,7-10,21-22H,6,11H2,1-2H3,(H,23,24,25)