InChI=1S/C16H16N4O2/c21-9-6-10-5-8-18-15-13(10)19-16(22)12-2-1-7-17-14(12)20(15)11-3-4-11/h1-2,5,7-8,11,21H,3-4,6,9H2,(H,19,22)