3-(2-hydroxy-4,5-dimethoxy-phenyl)-3-oxo-propionaldehyde

6,7-dimethoxy-4-oxo-4H-chromene-2-carboxylic acid ethyl ester

4-(2-hydroxy-4,5-dimethoxy-phenyl)-2,4-dioxo-butyric acid ethyl ester

3,4-二甲氧基苯酚

重氮甲烷