Using [N-]=[N+]=CC(=O)C1CCN(C(=O)OCc2ccccc2)CC1, Br to produce O=C(CBr)C1CCN(C(=O)OCc2ccccc2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.