Using COc1ccc2c(c1)C(C(C)C(=O)OCc1ccccc1)CN2C(=O)c1ccccc1 to produce COc1ccc2c(c1)C(C(C)C(=O)O)CN2C(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.