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