InChI=1/C18H18N2O/c1-3-13-19-17(15-7-5-4-6-8-15)18(21)20-16-11-9-14(2)10-12-16/h1,4-12,17,19H,13H2,2H3,(H,20,21)/t17-/m1/s1/f/h20H 85030304193C7ABE