InChI=1S/C11H18N4O4/c1-13-8(11(18)19)2-3-9-14-5-6(15-9)4-7(12)10(16)17/h5,7-8,13H,2-4,12H2,1H3,(H,14,15)(H,16,17)(H,18,19)/p+1/t7-,8?/m0/s1