Using C=C[Sn](CCCC)(CCCC)CCCC, COC(=O)C(CC(C)(C)c1cc(F)ccc1Br)C(=O)c1ccccc1 to produce C=Cc1ccc(F)cc1C(C)(C)CC(C(=O)OC)C(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.