has role is protonated form of has functional parent 3-(indol-3-yl)pyruvate indol-3-yl carboxylic acid 3-(indol-3-yl)pyruvic acid A 2-oxo monocarboxylic acid that is pyruvic acid substituted by a 1<em>H</em>-indol-3-yl group at position 3. It has been found in <em>Lycopersicon esculentum</em> pyruvic acid 2-oxo monocarboxylic acid Saccharomyces cerevisiae metabolite plant metabolite