Α-Ketobutyric acid

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What Wikipedia says

α-Ketobutyric acid is an organic compound with the formula CH3CH2C(O)CO2H. It is a colorless solid that melts just above room temperature. Its conjugate base α-ketobutyrate is the predominant form found in nature (near neutral pH). It results from the lysis of cystathionine.

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

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