InChI=1S/C9H16N2O7/c1-3(13)10-9(17)11-8-7(16)6(15)5(14)4(2-12)18-8/h4-8,12,14-16H,2H2,1H3,(H2,10,11,13,17)/t4-,5-,6+,7-,8-/m1/s1