Using COc1cc([N+](=O)[O-])c2ncccc2c1Br, OCC(F)(F)F to produce COc1cc([N+](=O)[O-])c2ncccc2c1OCC(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.