Using CCOC(=O)c1c(CCC(=O)O)[nH]c(C(=O)OC(C)(C)C)c1C to produce CCOC(=O)c1c(CCCO)[nH]c(C(=O)OC(C)(C)C)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.