Using O=C(C1=C(O)C2CCC(C2)C1=O)c1ccc(C(F)(F)F)nc1CO, BrCC1CO1 to produce O=C(C1=C(O)C2CCC(C2)C1=O)c1ccc(C(F)(F)F)nc1COCC1CO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.