InChI=1S/C26H26F2N2O/c27-23-9-5-21(6-10-23)26(22-7-11-24(28)12-8-22)30-18-16-29(17-19-30)15-1-2-20-3-13-25(31)14-4-20/h1-14,26,31H,15-19H2/b2-1+