Using C/C=C\c1cccc2c3c([nH]c12)C(CC)(CC(=O)OC)OCC3 to produce C/C=C\c1cccc2c3c([nH]c12)C(CC)(CC(=O)O)OCC3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.