Using CCCC[C@@H](C)C[C@@H](CC(=O)OC(C)(C)C)C(=O)O to produce CCCC[C@@H](C)C[C@H](CO)CC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.