Using OCC(F)(F)F, C[C@](O)(CNC(=O)c1cnc(Br)c(-c2ccc(Cl)cc2)n1)C1CC1 to produce C[C@](O)(CNC(=O)c1cnc(OCC(F)(F)F)c(-c2ccc(Cl)cc2)n1)C1CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.