Using COC(=O)Nc1cccc(OC(=O)Cl)c1, ClCCNc1ccccc1 to produce COC(=O)Nc1cccc(OC(=O)N(CCCl)c2ccccc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.