Using ClCCCl, N#CC1CC(C(=O)O)CCC1n1cc(C(N)=O)c(Nc2ccc(Cl)cc2)n1 to produce COC(=O)C1CCC(n2cc(C(N)=O)c(Nc3ccc(Cl)cc3)n2)C(C#N)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.