Using OB(O)c1cccc(C(F)(F)F)c1, O=C(NC1Cc2ccccc2C1)C1=CCC(F)(Br)C=C1 to produce O=C(NC1Cc2cccc(-c3cccc(C(F)(F)F)c3)c2C1)c1ccc(F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.