– 1H NMR (CDCl3): δ = 3.99 (s, 4 H, CH2). – 13C{1H} NMR (CDCl3): δ = 124.8 (br, C(NO2)3), 74.3 (s, CCH2), 26.8 (s, CH2). – 15N NMR (CDCl3): δ = −33.9 (s, NO2). – EA for C6H4N6O12 (352.13): calcd. C 20.47, H 1.14, N 23.87; found C ...