Using COC(=O)c1ccc(-c2ccc(NC(=O)CCCCl)nc2C)cc1 to produce COC(=O)c1ccc(-c2ccc(N3CCCC3=O)nc2C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.