Using CC1Cc2c(n(-c3ccc(Cl)c(Cl)c3)c3ncccc3c2=O)O1 to produce CC1Cc2c(c3cccnc3n(-c3ccc(Cl)c(Cl)c3)c2=O)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.