InChI=1/C18H16N4O4/c23-17-15-8-12(5-4-11(15)10-19-17)20-16-6-7-21(18(16)24)13-2-1-3-14(9-13)22(25)26/h1-5,8-9,16,20H,6-7,10H2,(H,19,23)/t16-/m1/s1/f/h19H D3AA272513CD5557