InChI=1S/C19H20N4O3/c1-3-22-17-15(5-4-10-20-17)23(19(26)18(22)25)12-16(24)21-11-14-8-6-13(2)7-9-14/h4-10H,3,11-12H2,1-2H3,(H,21,24)