InChI=1/C13H16N4O4/c1-7(13(19)16(2)3)14-10-6-9-8(5-12(18)15-9)4-11(10)17(20)21/h4,6-7,14H,5H2,1-3H3,(H,15,18)/t7-/m1/s1/f/h15H 71F379DFE74CAEF5