Using COc1cc(C(=O)/C=C/c2c[nH]c3ccccc23)cc(OC)c1OC, O=C([O-])[O-] to produce COc1cc(C(=O)/C=C/c2cn(C)c3ccccc23)cc(OC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.