3-hydroxy-1H-indole-2-carboxylic acid,ethyl ester, 3-hydroxy-indole-2-carboxylic acid ethyl ester, 3-Hydroxy-indol-2-carbonsaeure-aethylester, ethyl 3-hydroxyindole-2-carboxylate, Indoxyl-2-carbonsaeureethylester od. 3-Oxoindolin-2-carabonsaeureethylester, 2-Carbethoxy-3-hydroxyindol, EINECS 238-341-4