Using CCCCCOc1ccc(-c2cc(-c3ccc(C(=O)OCC)cc3)no2)cc1 to produce CCCCCOc1ccc(-c2cc(-c3ccc(C(=O)O)cc3)no2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.