Using [O-][I+3]([O-])([O-])[O-], C=CCC(C(=O)OCC)C(=O)c1ccc(C)cc1 to produce CCOC(=O)C(CC=O)C(=O)c1ccc(C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.