Using Fc1cc2nonc2cc1Br, COC(=O)c1nc([Sn](C)(C)C)c(F)c(N)c1Cl to produce COC(=O)c1nc(-c2cc3nonc3cc2F)c(F)c(N)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.