Using Cn1c2c(c3c(C(=O)OC(C)(C)C)c(S(=O)(=O)c4cccc([N+](=O)[O-])c4)ccc31)C1CCC(C2)N1 to produce Cn1c2c(c3cc(S(=O)(=O)c4cccc(N)c4)ccc31)C1CCC(C2)N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.