Using CCC1(C)C(O)=NN=C1C1CCN(C(=O)OC(C)(C)C)CC1, O=C([O-])[O-] to produce CCC1(C)C(OC)=NN=C1C1CCN(C(=O)OC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.