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