ethyl 2-(2-oxo-2,3-dihydro-1H-indol-3-ylidene)acetate

2-(2-oxo-1,2-dihydro-3H-indol-3(E)-ylidene)acetic acid ethyl ester

1H-Indole-3-acetic acid, 3-acetyl-2,3-dihydro-2-oxo-, ethyl ester

吲哚-2,3-二酮

2-(2-硝基苯基)丙二酸二甲酯