Using Cc1ccc(-c2nc3cc(Cl)cnc3nc2-c2ccc(C)cc2)cc1, CO to produce COc1cnc2nc(-c3ccc(C)cc3)c(-c3ccc(C)cc3)nc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.