InChI=1/C18H20N4O/c1-22(2)10-9-20-18(23)12-7-8-14-16(11-12)21-15-6-4-3-5-13(15)17(14)19/h3-8,11H,9-10H2,1-2H3,(H2,19,21)(H,20,23)/p+2/fC18H22N4O/h20-22H,19H2/q+2 5019463E4E1DC8B2