Using CCOP(=O)(Cc1ccccc1Cl)OCC, COc1cc(Br)c2oc(C=O)cc2c1 to produce COc1cc(Br)c2oc(/C=C/c3ccccc3Cl)cc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.