Using CCCC[Sn](CCCC)(CCCC)c1nccnc1F, CC(=O)NC1=N[C@](C)(c2ccc(F)c(Br)c2)CCS1 to produce CC(=O)NC1=N[C@](C)(c2ccc(F)c(-c3nccnc3F)c2)CCS1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.