吲哚-3-乙酸

(E)-benzyl 2-hydroxy-2-(2-oxoindolin-3-ylidene)acetate

2-hydroxy-2-(2-oxo-1H-indol-3-ylidene)acetic acid

2-吲哚酮

(2-oxo-indolin-3-yl)-glyoxylic acid benzyl ester