Using CCCC[Sn](Cl)(CCCC)CCCC, Fc1ccc(-c2cn3c(n2)CCC3)cc1 to produce CCCC[Sn](CCCC)(CCCC)c1c(-c2ccc(F)cc2)nc2n1CCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.