Using C=C(C(=O)OCC)[C@H]1CCN(C(=O)OCc2ccccc2)C1, C=[N+]=[N-] to produce CCOC(=O)C1([C@H]2CCN(C(=O)OCc3ccccc3)C2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.