3-[hydroxy(phenyl)methylidene]-6-phenylpyran-2,4-dione

N,N'-bis(benzenesulfonyl)-N,N'-diphenyloxamide

1,2-二(4-乙氧基苯基)-1,2-乙烷二酮

苯氧代乙醛

1,4-dioxane-2,3,5,6-tetrone