Citraconic acid

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Citraconic acid is an organic compound with the formula CH3C2H(CO2H)2. It is a white solid. The alkene is cis. The related trans alkene is called mesaconic acid. It is one of the pyrocitric acids formed upon the heating of citric acid.

Excerpt from the Wikipedia article “Citraconic acid”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Ed (Edgar181), Public domain, via Wikimedia Commons.