Using Nc1cnc(Br)c(-c2ccco2)n1, CSc1nccc([Sn](C)(C)C)n1 to produce CSc1nccc(-c2ncc(N)nc2-c2ccco2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.