InChI=1/C20H20N4O2/c1-3-16(19-22-17-6-4-5-7-18(17)23-19)24-20(25)13(2)26-15-10-8-14(12-21)9-11-15/h4-11,13,16H,3H2,1-2H3,(H,22,23)(H,24,25)/t13-,16-/m1/s1/f/h22,24H 21E47FD141E29F1E