Using Brc1ccc(Br)nc1, C#CCn1ccc2cc(CN3CCCC3)ccc21 to produce Brc1ccc(C#CCn2ccc3cc(CN4CCCC4)ccc32)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.