InChI=1S/C21H20N4O4S2/c26-20-17-13-19-16(12-18(31-19)14-3-1-4-15(11-14)25(27)28)24(17)21(30)23(20)6-2-5-22-7-9-29-10-8-22/h1,3-4,11-13H,2,5-10H2