InChI=1S/C22H20N2O13S2/c25-17-18(26)20(21(28)29)37-22(19(17)27)36-15-8-1-10-9-13(39(33,34)35)6-7-14(10)16(15)24-23-11-2-4-12(5-3-11)38(30,31)32/h1-9,17-20,22,25-27H,(H,28,29)(H,30,31,32)(H,33,34,35)/b24-23+