Using CCOC(=O)CC(=O)c1cccnc1C(F)(F)F, COc1cc(C(=O)CBr)cc([N+](=O)[O-])c1OC to produce CCOC(=O)c1c(-c2cc(OC)c(OC)c([N+](=O)[O-])c2)coc1-c1cccnc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.