Using CCOc1c([N+](=O)[O-])cc2cc(C(=O)OC)sc2c1OCC to produce COC(=O)c1cc2cc([N+](=O)[O-])c(O)c(O)c2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.