Using Clc1ccc2ncc(Br)n2n1, CCCC[Sn](CCCC)(CCCC)c1ccnnc1OC to produce COc1nnccc1-c1cnc2ccc(Cl)nn12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.