Using OB(O)c1ccc(Cl)cc1, Clc1ncnc(Cl)c1-c1ccncc1 to produce Clc1ccc(-c2ncnc(Cl)c2-c2ccncc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.