Using COc1ccc2c(Cc3c(Cl)cncc3Cl)nncc2c1OCc1ccccc1 to produce COc1ccc2c(Cc3c(Cl)cncc3Cl)nncc2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.