4-hydroxy-7,8-dimethoxychromen-2-one

1-(2-hydroxy-3,4,5-trimethoxyphenyl)ethanone

1,2,3,4-四甲氧基苯

1-(2,5-dihydroxy-3,4-dimethoxyphenyl)ethanone

2,3-二羟基-4-甲氧基苯乙酮