InChI=1S/C9H14N2O7/c10-4(8(15)16)1-2-6(12)11-5(9(17)18)3-7(13)14/h4-5H,1-3,10H2,(H,11,12)(H,13,14)(H,15,16)(H,17,18)/t4-,5-/m0/s1