Using [O-][I+3]([O-])([O-])[O-], C=CCc1cc2ccc(=O)oc2c(OC)c1OC(C)=O to produce COc1c(OC(C)=O)c(CC=O)cc2ccc(=O)oc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.