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