Using CCOC(=O)c1cc2c(s1)-c1ccccc1N(C(=O)c1ccc([N+](=O)[O-])cc1)CC2 to produce O=C(O)c1cc2c(s1)-c1ccccc1N(C(=O)c1ccc([N+](=O)[O-])cc1)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.