Using CCOC(=O)C(=O)c1c(C)sc(C)c1-c1ccc2c(c1)CCCO2 to produce CCOC(=O)C(O)c1c(C)sc(C)c1-c1ccc2c(c1)CCCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.