Using O=c1[nH][nH]c2cc([N+](=O)[O-])ccc12, COS(=O)(=O)OC to produce Cn1[nH]c2cc([N+](=O)[O-])ccc2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.