Using COC(=O)c1ccc(Br)c(OCCc2ccc(Cl)cc2Cl)c1 to produce O=C(O)c1ccc(Br)c(OCCc2ccc(Cl)cc2Cl)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.