6,8-dimethyl-2,4-bis(sulfanylidene)-1H-pyrimido[4,5-d][1,3]thiazine-5,7-dione

2-(4-chlorophenyl)-2-hydroxy-1-phenylethanone

sulfuric acid mono-m-tolyl ester

4-羟基-2-甲基苯磺酸铵

1-(2-溴苯基)-3,3-二(甲硫基)丙-2-烯-1-酮