Using CSc1nc(Cl)c(C=O)c(Nc2ccccc2)n1, OB(O)c1ccccc1 to produce CSc1nc(Nc2ccccc2)c(C=O)c(-c2ccccc2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.