Using CCC(CC)O[C@@H]1C=C(C(=O)OC)C[C@H](CC2CO2)[C@H]1NC(C)=O to produce CCC(CC)O[C@@H]1C=C(C(=O)O)C[C@H](CC2CO2)[C@H]1NC(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.