Using O=C1Nc2cc(F)ccc2C1=O, CC(C)(C)OC(=O)CBr to produce CC(C)(C)OC(=O)CN1C(=O)C(=O)c2ccc(F)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.