InChI=1S/C23H28N2/c1-18-11-13-21(14-12-18)25-17-20(22-9-5-6-10-23(22)25)16-24-15-19-7-3-2-4-8-19/h5-6,9-14,17,19,24H,2-4,7-8,15-16H2,1H3