InChI=1S/C11H14N4O8/c16-2-4(18)6(19)3(17)1-15-7-5(12-9(21)10(15)22)8(20)14-11(23)13-7/h3-4,6,16-19H,1-2H2,(H,12,21)(H2,13,14,20,23)/t3-,4+,6-/m0/s1