4-(3,4-dimethoxy-benzylidene)-2-phenyl-4H-oxazol-5-one

tert-butyl 3,4-dimethoxyphenylacetate

3-methylbut-1-en-2-ol

2-(2-碘-4,5-二甲氧基苯基)乙酸

3,3-dimethyl-butan-2-one, enol form