Using COC(=O)C1(CN(c2nc(Cl)ncc2[N+](=O)[O-])C2CCCC2)CCC1 to produce O=C1Nc2cnc(Cl)nc2N(C2CCCC2)CC12CCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.