Using Brc1ccc2c(c1)-c1nc(I)cn1CCO2, CCCC[Sn](CCCC)(CCCC)c1ncccc1C to produce Cc1cccnc1-c1cn2c(n1)-c1cc(Br)ccc1OCC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.