Using CCC(=O)C(=O)Nc1c(C)c(C)c2c(c1C)C(c1ccc(C(C)C)cc1)CO2 to produce CCC(O)C(=O)Nc1c(C)c(C)c2c(c1C)C(c1ccc(C(C)C)cc1)CO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.