InChI=1S/C17H22N2O2/c20-16-11-13(12-19(16)15-9-5-2-6-10-15)17(21)18-14-7-3-1-4-8-14/h1,3-4,7-8,13,15H,2,5-6,9-12H2,(H,18,21)/t13-/m0/s1