InChI=1S/C11H15N5O4/c1-16-3-13-5-6(14-15-7(5)11(16)12)10-9(19)8(18)4(2-17)20-10/h3-4,8-10,17-19H,2H2,1H3,(H2,12,14,15)/p+1/t4-,8-,9-,10+/m1/s1