Using CC(C(=O)c1ncc(Cl)cc1Cl)N1C(=O)c2ccccc2C1=O, CON to produce CON=C(c1ncc(Cl)cc1Cl)C(C)N1C(=O)c2ccccc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.