InChI=1S/C20H18O8S/c1-20(10-26-29(22,23)24)7-6-14-16(28-20)5-4-12-15-9-25-17-8-11(21)2-3-13(17)19(15)27-18(12)14/h2-8,15,19,21H,9-10H2,1H3,(H,22,23,24)