Using CCOC(=O)C(Br)C(=O)OCC, COc1ccc(C=O)c(O)c1Cl to produce CCOC(=O)C1(C(=O)OCC)Oc2c(ccc(OC)c2Cl)C1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.