InChI=1S/C8H12N2O7/c11-1-2-3(12)4(13)5(14)8(17-2)6(15)9-7(16)10-8/h2-5,11-14H,1H2,(H2,9,10,15,16)/t2-,3-,4+,5-,8-/m1/s1