Using CC(C)(C)OC(=O)N[C@H]1CC[C@H](Nc2nc(N3CCc4cc([N+](=O)[O-])ccc43)c3ncn(C(=O)OC(C)(C)C)c3n2)CC1 to produce CC(C)(C)OC(=O)N[C@H]1CC[C@H](Nc2nc(N3CCc4cc(N)ccc43)c3ncn(C(=O)OC(C)(C)C)c3n2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.