Using CC(=O)c1cccc(-c2ccc3nc(-c4ccc(Cl)cc4)cn3c2)c1 to produce CC(O)c1cccc(-c2ccc3nc(-c4ccc(Cl)cc4)cn3c2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.