Using Cc1cc(Cl)cc(Cl)c1N1CCCn2c1nc1c(Cl)ccc(CO)c12 to produce Cc1cc(Cl)cc(Cl)c1N1CCCn2c1nc1c(Cl)ccc(C=O)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.