Using CCCC[Sn](CCCC)(CCCC)c1ccccc1, Cn1ncc2[nH]c3c(Br)cccc3c(=O)c21 to produce Cn1ncc2[nH]c3c(-c4ccccc4)cccc3c(=O)c21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.