3-(4-羟基-4-氧代丁基)-1H-吲哚-2-羧酸

4-(2-ethoxycarbonyl-indol-3-yl)-butyric acid ethyl ester

5-(2-amino-phenyl)-6-chloro-hex-5-enoic acid

1-hydroxy-carbazole-2-carboxylic acid

4-(1H-indol-3-yl)butanenitrile