Using Cc1c(OC[C@@H]2CCCN2C(=O)OC(C)(C)C)cccc1[N+](=O)[O-] to produce Cc1c(N)cccc1OC[C@@H]1CCCN1C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.