Using COc1nccc2nc(-c3ccccc3OCc3ccccc3)n(CCc3ccccc3)c(=O)c12 to produce COc1nccc2nc(-c3ccccc3O)n(CCc3ccccc3)c(=O)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.