Using CCCC[Sn](CCCC)(CCCC)C1(O)CCN(C(C)=O)CC1 to produce CCCC[Sn](CCCC)(CCCC)C1=CCN(C(C)=O)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.