Using O, [O-][n+]1ccc2cc(-c3ccccc3)c(-c3ccc(CO)cc3)nc2c1 to produce O=c1[nH]ccc2cc(-c3ccccc3)c(-c3ccc(CO)cc3)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.