2,5-二甲氧基苯甲醛

6-[(hydroxyamino)methylidene]-4-methoxycyclohexa-2,4-dien-1-one

ethyl 3-(2,4-dimethoxyphenyl)-2-ethoxycarbonyl-2-propenoate

N-hydroxy-6-methoxy-2-oxochromene-3-carboxamide

2,4-dimethoxybenzylidenemalonic acid