Using COc1nc2cc([N+](=O)[O-])c(C)c(C(=O)NCC(=O)OC(C)(C)C)c2nc1OC to produce Cc1c([N+](=O)[O-])cc2[nH]c(=O)c(=O)[nH]c2c1C(=O)NCC(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.