InChI=1/C18H18N4O4/c1-8-4-6-11(7-5-8)12(13-15(23)19-9(2)20-16(13)24)14-17(25)21-10(3)22-18(14)26/h4-7,12H,1-3H3,(H2,19,20,23,24)(H2,21,22,25,26)/p-2/fC18H16N4O4/h19,21H/q-2 624FE47864064503