Using Cn1cc(-c2ccc3c(c2)CCN3)c2c(N)ncnc21, O=C(O)Cc1cccc(Cl)n1 to produce Cn1cc(-c2ccc3c(c2)CCN3C(=O)Cc2cccc(Cl)n2)c2c(N)ncnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.