3,5-二氢-4H-吡嗪并[4,5-b]吲哚-4-酮

3-Formyl-1H-indole-2-carboxylic acid

3-羟基-1H-吲哚-2-羧酸乙酯

Ethyl 3-(hydroxymethyl)-1H-indole-2-carboxylate

2-(Ethoxycarbonyl)-1H-indole-3-carboxylic acid