Using COS(=O)(=O)OC, O=C(c1ccccc1)c1nc(S)ccc1[N+](=O)[O-] to produce CSc1ccc([N+](=O)[O-])c(C(=O)c2ccccc2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.