Using C=CCBr, CCOC(=O)c1c(O)cc(C(F)(F)F)nc1C(F)(F)F to produce C=CCOc1cc(C(F)(F)F)nc(C(F)(F)F)c1C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.