Using COC(=O)C(=C(C)C)N1C(=O)[C@@H](NC(=O)OCc2ccccc2)[C@@H]1OC(C)=O, O=[O+][O-] to produce COC(=O)C(=O)N1C(=O)[C@@H](NC(=O)OCc2ccccc2)[C@@H]1OC(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.