InChI=1/C21H18N4O2/c1-14-8-9-23-21(10-14)24-15(2)11-18(16(24)3)12-19(13-22)17-4-6-20(7-5-17)25(26)27/h4-12H,1-3H3/b19-12- 3E1589A84B4DD274