Using CCOC(=O)C(F)(F)Br, C[C@@H](C=O)NC(=O)OC(C)(C)C to produce CCOC(=O)C(F)(F)[C@H](O)[C@H](C)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.