Using COc1ccc2c(c1)C(CC(=O)O)CC2=C1C(=O)Nc2ccccc21 to produce COc1ccc2c(c1)C(CC(=O)[O-])CC2=C1C(=O)Nc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.