InChI=1S/C12H17N5O4/c1-13-10-7-11(15-4-14-10)17(5-16-7)12-9(20-2)8(19)6(3-18)21-12/h4-6,8-9,12,18-19H,3H2,1-2H3,(H,13,14,15)/t6-,8-,9-,12-/m1/s1