InChI=1S/C22H20N2O14S2/c25-16-12-5-7-13(37-22-19(28)17(26)18(27)20(38-22)21(29)30)15(11(12)6-8-14(16)40(34,35)36)24-23-9-1-3-10(4-2-9)39(31,32)33/h1-8,17-20,22,25-28H,(H,29,30)(H,31,32,33)(H,34,35,36)/b24-23+