Using CC(=CCCl)c1cc(Cl)ccc1Cl, CCOC(=O)CC(C)=O to produce CCOC(=O)C(CC=C(C)c1cc(Cl)ccc1Cl)C(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.