Using OCc1ccccc1, Cc1cc(O)c([N+](=O)[O-])c(=O)n1CC(=O)O to produce Cc1cc(O)c([N+](=O)[O-])c(=O)n1CC(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.