InChI=1S/C19H20O8S/c1-11-14-8-12(6-7-20)9-17(25-3)19(14)26-18(11)13-4-5-15(16(10-13)24-2)27-28(21,22)23/h4-5,7-11,18H,6H2,1-3H3,(H,21,22,23)