Using C=CC[Sn](CCCC)(CCCC)CCCC, COc1ccc(OS(=O)(=O)C(F)(F)F)c(Cc2ccccc2)c1 to produce C=CCc1ccc(OC)cc1Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.