Using CCCC[Sn](Cl)(CCCC)CCCC, CC(C)(C)OC(=O)Nc1ccccc1 to produce CCCC[Sn](CCCC)(CCCC)c1ccccc1NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.