Using FC(F)(F)c1cc(Cl)c(-n2cc(I)c(C(F)(F)F)n2)c(Cl)c1, C=C[Sn](CCCC)(CCCC)CCCC to produce C=Cc1cn(-c2c(Cl)cc(C(F)(F)F)cc2Cl)nc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.