Using C=CCBr, CCOC(=O)c1c(C(F)(F)F)nc(C(F)(F)F)c(C)c1O to produce C=CCOc1c(C)c(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.