Using Brc1ccc2c(c1)-c1nc(I)cn1CCO2, CCCC[Sn](CCCC)(CCCC)c1cc(C)ccn1 to produce Cc1ccnc(-c2cn3c(n2)-c2cc(Br)ccc2OCC3)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.