Using [N-]=[N+]=[N-], O=C(O)CC12CCC(c3cccc(Oc4ccccc4)c3)(CC1)OC2 to produce [N-]=[N+]=NC(=O)CC12CCC(c3cccc(Oc4ccccc4)c3)(CC1)OC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.