Using O=[N+]([O-])c1ccc2nc(-c3ccc4c(c3)OCO4)ncc2c1 to produce Nc1ccc2nc(-c3ccc4c(c3)OCO4)ncc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.