Using CCc1cnc(N)n1CCO, Cn1c(C=O)cnc1[N+](=O)[O-] to produce CCc1cnc(N=Cc2cnc([N+](=O)[O-])n2C)n1CCO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.