InChI=1S/C19H19N3O2/c20-10-18(14-3-1-13(12-23)2-4-14)19(24)22-17-6-5-16-11-21-8-7-15(16)9-17/h1-9,11,18,23H,10,12,20H2,(H,22,24)/t18-/m1/s1