Using CCOC(=O)C=C(c1ccccc1)n1cnc2c(Br)cc(C(F)(F)F)cc21 to produce CCOC(=O)CC(c1ccccc1)n1cnc2ccc(C(F)(F)F)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.