InChI=1/C18H16N4O4/c1-8-3-4-9-6-11(17(24)19-12(9)5-8)10-7-13(23)20-16-14(10)15(21-22-16)18(25)26-2/h3-6,10H,7H2,1-2H3,(H,19,24)(H2,20,21,22,23)/t10-/m1/s1/f/h19-20,22H A8F566458691880C