112182-59-9
2,2-dimethyl-5-(1-methylsulfanylethylidene)-1,3-dioxane-4,6-dione
+
589-21-9
对溴苯肼
→
~64%
35496-21-0
2-(4-bromophenyl)-5-methyl-1H-pyrazol-3-one
141-97-9
乙酰乙酸乙酯