Using O=C(Cl)c1ccncc1, O=C1Nc2cccnc2Nc2ccccc21 to produce O=C1Nc2cccnc2N(C(=O)c2ccncc2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.