InChI=1S/C20H19N3O3/c24-14-7-5-12(6-8-14)9-17-19(25)23-18(20(26)22-17)10-13-11-21-16-4-2-1-3-15(13)16/h1-8,11,17-18,21,24H,9-10H2,(H,22,26)(H,23,25)/t17-,18-/m0/s1