<3-<2-(ethoxycarbonyl)indolyl>>acetaldehyde
3-((E)-2-Methoxy-vinyl)-1H-indole-2-carboxylic acid ethyl ester
ethyl 3-formyl-1H-indole-2-carboxylate
3-{2-[(R)-1-((1R,2R,3S)-1-Cyclohexylmethyl-2,3-dihydroxy-5-methyl-hexylcarbamoyl)-2-(1H-imidazol-4-yl)-ethylamino]-ethyl}-1H-indole-2-carboxylic acid ethyl ester