InChI=1/C20H18N2O/c1-13-4-5-16(20(23)22-17-8-9-17)11-18(13)15-7-6-14-3-2-10-21-19(14)12-15/h2-7,10-12,17H,8-9H2,1H3,(H,22,23)/f/h22H 962867A8CB1C3C18