Using CCCC[Sn](CCCC)(CCCC)C1=C(C)C(=O)C12OCCO2 to produce CCCC[Sn](CCCC)(CCCC)c1c(C)c(=O)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.