Using BrBr, O=C(c1ccc(Cl)c(Cl)c1)N1CCc2ccccc21 to produce O=C(c1ccc(Cl)c(Cl)c1)N1CCc2cc(Br)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.