Using CCCC(=O)Nc1n[nH]c2c([N+](=O)[O-])c(Br)ccc12 to produce CCCC(=O)Nc1n[nH]c2c(N)c(Br)ccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.