Using O=C(Cl)c1ccccc1, NC(=O)c1cc(-c2ccccc2)cc2c(C3CCNCC3)n[nH]c12 to produce NC(=O)c1cc(-c2ccccc2)cc2c(C3CCN(C(=O)c4ccccc4)CC3)n[nH]c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.