Using CN(CCN1CCSc2cc([N+](=O)[O-])ccc21)C(=O)OC(C)(C)C to produce CN(CCN1CCSc2cc(N)ccc21)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.