InChI=1S/C19H20N4O3/c1-13-6-8-15(9-7-13)23-21-17(12-24)18(22-23)19(25)20-11-14-4-3-5-16(10-14)26-2/h3-10,24H,11-12H2,1-2H3,(H,20,25)