InChI=1/C21H28N4O2/c26-20(22-10-9-15-14-24-18-8-4-3-7-17(15)18)13-19-21(27)23-11-12-25(19)16-5-1-2-6-16/h3-4,7-8,14,16,19,24H,1-2,5-6,9-13H2,(H,22,26)(H,23,27)/t19-/m0/s1/f/h22-23H 406E766210E38366