InChI=1/C19H20N4O/c1-12-6-9-16(10-7-12)23-15(4)18(21-22-23)19(24)20-17-11-13(2)5-8-14(17)3/h5-11H,1-4H3,(H,20,24)/f/h20H 18B45CBC4644B33B