InChI=1S/C19H20O15S/c20-4-8-12(24)17(29)19(34-35(30,31)32)18(33-8)10-13(25)9(14(26)16(28)15(10)27)11(23)5-1-2-6(21)7(22)3-5/h1-3,8,12,17-22,24-29H,4H2,(H,30,31,32)