Using O=C(O)c1cc([N+](=O)[O-])ccn1, CC(C)(C)OC(=O)NCCN to produce CC(C)(C)OC(=O)NCCNC(=O)c1cc([N+](=O)[O-])ccn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.