Using O=C(O)Cc1ccc([N+](=O)[O-])cc1, O=C1CCC(=O)N1Br to produce O=C(O)C(Br)c1ccc([N+](=O)[O-])cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.