Using CCCC[Sn](Cl)(CCCC)CCCC, CCOP(=O)(OCC)c1ccco1 to produce CCCC[Sn](CCCC)(CCCC)c1ccc(P(=O)(OCC)OCC)o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.