InChI=1S/C10H16N4O4/c11-7(9(15)16)1-2-13-8(10(17)18)3-6-4-12-5-14-6/h4-5,7-8,13H,1-3,11H2,(H,12,14)(H,15,16)(H,17,18)/t7-,8+/m0/s1