Using CCOC(=O)c1cc(-c2cccc(-c3cc(C(=O)OCC)on3)n2)no1 to produce O=C(O)c1cc(-c2cccc(-c3cc(C(=O)O)on3)n2)no1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.