Using COS(=O)(=O)OC, O=[N+]([O-])c1ccc2c(c1)nc1n2CC(O)C1 to produce COC1Cc2nc3cc([N+](=O)[O-])ccc3n2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.