Using Cn1ccc(NC(=O)c2cc(OCc3ccccc3)c3c(c2)OC(CO)C3)n1 to produce Cn1ccc(NC(=O)c2cc(OCc3ccccc3)c3c(c2)OC(C=O)C3)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.