InChI=1/C19H20N2O/c1-21(15-18-11-6-3-7-12-18)16-19(22)20-14-8-13-17-9-4-2-5-10-17/h2-7,9-12H,14-16H2,1H3,(H,20,22)/f/h20H 4884664EC7CC0673