Nc1c([N+](=O)[O-])cc([N+](=O)[O-])c(Br)c1[N+](=O)[O-] mol5999 0_1 [NH3+]c1c([N+](=O)[O-])cc([N+](=O)[O-])c(Br)c1[N+](=O)[O-] mol5999 1_1