InChI=1S/C20H19N3O3/c24-18-11-15(13-5-1-3-7-16(13)22-18)20(26)23-17-8-4-2-6-14(17)19(25)21-12-9-10-12/h1-8,12,15H,9-11H2,(H,21,25)(H,22,24)(H,23,26)