Using CC(C)(C)OC(=O)N1CCN(C(=O)OCc2ccccc2)C[C@@H]1CCO, O=[Cr](=O)([O-])O[Cr](=O)(=O)[O-] to produce CC(C)(C)OC(=O)N1CCN(C(=O)OCc2ccccc2)C[C@@H]1CC(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.