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