Using OB(O)c1ccncc1, Clc1cncc(Nc2ccc3scnc3c2)n1 to produce c1cc(-c2cncc(Nc3ccc4scnc4c3)n2)ccn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.