Using O=C(CBr)c1ccc(Cl)cc1Cl, CCOC(=O)CC(C)=O to produce CCOC(=O)C(CC(=O)c1ccc(Cl)cc1Cl)C(C)=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.