InChI=1/C20H20N2/c1-22-11-9-16(10-12-22)19-14-21-20-8-7-17(13-18(19)20)15-5-3-2-4-6-15/h2-9,13H,10-12,14H2,1H3/p+2/fC20H22N2/h21-22H/q+2 30B18C7001D89BDC