InChI=1S/C21H20O15S/c22-5-11-14(26)21(36-37(31,32)33)18(30)20(35-11)13-16(28)17(29)15(27)12-9(25)4-10(34-19(12)13)6-1-2-7(23)8(24)3-6/h1-4,11,14,18,20-24,26-30H,5H2,(H,31,32,33)