Using COC(=S)c1ccc(C)c(Br)c1, C=C(OCC)[Sn](CCCC)(CCCC)CCCC to produce COC(=S)c1ccc(C)c(C(C)=O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.