Using CCOC(=O)c1nn(-c2ccc(Cl)cc2Cl)c(-c2ccc(Cl)cc2)c1Br to produce O=C(O)c1nn(-c2ccc(Cl)cc2Cl)c(-c2ccc(Cl)cc2)c1Br, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.