InChI=1/C16H16N4O2/c1-9(11-5-3-4-6-12(11)21-2)7-10-8-22-15-13(10)14(17)19-16(18)20-15/h3-8H,1-2H3,(H4,17,18,19,20)/b9-7-/f/h17-18H2 8863480270E8F71B