InChI=1S/C22H20N2O14S2/c25-13-7-5-12-11(15(13)24-23-9-1-3-10(4-2-9)39(31,32)33)6-8-14(40(34,35)36)19(12)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+