InChI=1S/C19H22N2O2/c1-2-13-11-21(23)8-7-18-9-14(12-22)15(13)10-19(18,21)20-17-6-4-3-5-16(17)18/h2-6,9,15,20,22H,7-8,10-12H2,1H3/t15-,18+,19-,21?/m0/s1