Glutaconic acid

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What Wikipedia says

trans-Glutaconic acid is an organic compound with formula HO2CCH=CHCH2CO2H. This dicarboxylic acid exists as a colorless solid and is related to the saturated chemical glutaric acid, HO2CC(CH2)3CO2H. Esters and salts of glutaconic acid are called glutaconates.

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

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