Using COc1cc(O)c(C(=O)C=Cc2ccc([N+](=O)[O-])cc2)c(OC)c1OC to produce COc1cc2oc(-c3ccc([N+](=O)[O-])cc3)cc(=O)c2c(OC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.