Using O=C(c1cccs1)c1nc(NCc2cccnc2)nc2cc(Cl)sc12, CCN to produce CCNc1cc2nc(NCc3cccnc3)nc(C(=O)c3cccs3)c2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.