Using Cc1nc(CO)c(C(=O)O)c(-c2cccc([N+](=O)[O-])c2)c1C(=O)OCCO to produce Cc1nc2c(c(-c3cccc([N+](=O)[O-])c3)c1C(=O)OCCO)C(=O)OC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.