InChI=1/C15H16N4O/c1-18-7-9-19(10-8-18)15-13(11-16)17-14(20-15)12-5-3-2-4-6-12/h2-6H,7-10H2,1H3/p+1/fC15H17N4O/h18H/q+1 D7B477927DDEF302