Using CCO[NH3+], CCCC(=O)C1C(=O)CC(c2ccc(Cl)cc2)CC1=O to produce CCONCCCC=C1C(=O)CC(c2ccc(Cl)cc2)CC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.