Using CCCC[Sn](CCCC)(CCCC)C1=CCCC1, COc1ccc2c(cc(I)n2S(=O)(=O)c2ccccc2)c1OC to produce COc1ccc2c(cc(C3=CCCC3)n2S(=O)(=O)c2ccccc2)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.