Using OB(O)c1ccc(Cl)c(Cl)c1, CCn1cnc2c(C#N)nc(Cl)cc21 to produce CCn1cnc2c(C#N)nc(-c3ccc(Cl)c(Cl)c3)cc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.