InChI=1/C15H14N4O2/c1-15(2)10-6-9(4-5-11(10)18-14(20)21-15)12-8-17-13(7-16)19(12)3/h4-6,8H,1-3H3,(H,18,20)/f/h18H A7F3E1BE242E111E