Using O=C(NCc1ccc(Br)c(Cn2ccc3ccccc32)c1)C(F)(F)F to produce O=C(NCc1ccc2c(c1)Cn1c-2cc2ccccc21)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.