Using [O-][I+3]([O-])([O-])[O-], C=CCc1cc2c(C)cc(=O)oc2c(OC)c1O to produce COc1c2c(cc3c(C)cc(=O)oc13)CC(O)O2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.