InChI=1S/C18H18N4O/c1-12(23)14-3-2-4-15(9-14)16-11-20-18-8-7-17(21-22(16)18)19-10-13-5-6-13/h2-4,7-9,11,13H,5-6,10H2,1H3,(H,19,21)