InChI=1S/C20H28F2N2O/c1-14(2)12-23-19(25)16-10-20(22,11-16)17-6-5-15(18(21)9-17)13-24-7-3-4-8-24/h5-6,9,14,16H,3-4,7-8,10-13H2,1-2H3,(H,23,25)/t16-,20-