InChI=1/C20H20N4O/c1-11(2)18-15-8-6-13(9-14(15)10-22-23-18)17-12(3)5-7-16-19(17)25-24-20(16)21-4/h5-11H,1-4H3,(H,21,24)/f/h21H 0A013497604F5A8A