Using [O-][I+3]([O-])([O-])[O-], C=Cc1cc(C(=O)OC(C)(C)C)cc(Cl)n1 to produce CC(C)(C)OC(=O)c1cc(Cl)nc(C=O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.