Using CCCc1c(Cc2ccc(-c3ccccc3C#N)cc2)c(=O)[nH]c2nc(C)nn12, OC(CBr)C(F)(F)F to produce CCCc1c(Cc2ccc(-c3ccccc3C#N)cc2)c(=O)n(CC(O)C(F)(F)F)c2nc(C)nn12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.