InChI=1/C13H16N4O4/c1-13(2,3)15-11(18)12(19)16-14-8-9-6-4-5-7-10(9)17(20)21/h4-8H,1-3H3,(H,15,18)(H,16,19)/b14-8+/f/h15-16H CCAC5387BDABC3CA