Using O=S(=O)(Oc1ccc2c(c1)CCc1nc(-c3onc(-c4ccccc4)c3C(F)(F)F)sc1-2)C(F)(F)F, C=C[Sn](CCCC)(CCCC)CCCC to produce C=Cc1ccc2c(c1)CCc1nc(-c3onc(-c4ccccc4)c3C(F)(F)F)sc1-2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.