Using COC(=O)c1nc(-c2ccc(Cl)c(OC)c2F)cc(NC(C)=O)c1Cl, C=C[Sn](CCCC)(CCCC)CCCC to produce C=Cc1c(NC(C)=O)cc(-c2ccc(Cl)c(OC)c2F)nc1C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.