Using O=S(=O)(Nc1ccncn1)c1ccc2c(Cl)nccc2c1, OB(O)c1cnn(-c2cccc(Cl)c2)c1 to produce O=S(=O)(Nc1ccncn1)c1ccc2c(-c3cnn(-c4cccc(Cl)c4)c3)nccc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.