Using COc1cnc2c(NCc3nnc4ccc(Cl)nn34)ccnc2c1, OB(O)c1cn[nH]c1 to produce COc1cnc2c(NCc3nnc4ccc(-c5cn[nH]c5)nn34)ccnc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.