Using CCOC(=O)CBr, CC(=O)c1ccc(-c2ccc(F)cn2)cc1F to produce CCOC(=O)CC(C)(O)c1ccc(-c2ccc(F)cn2)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.