InChI=1/C16H20N4O/c21-15(13-7-3-1-4-8-13)11-12-16-17-18-19-20(16)14-9-5-2-6-10-14/h2,5-6,9-10,13H,1,3-4,7-8,11-12H2 FA2C0F1815B1BED1