InChI=1/C18H20N4O/c1-3-4-5-10-22-17-11-13(6-8-15(17)20-18(22)23)16-9-7-14(12-19)21(16)2/h6-9,11H,3-5,10H2,1-2H3,(H,20,23)/f/h23H 0F88957950848513