Asparagusic acid is the organosulfur with the formula S2(CH2)2CHCO2H. The molecule contains both carboxylic acid and disulfide functional groups. It is present in the vegetable asparagus and may be the metabolic precursor to other odorous thiol compounds.
Biosynthetic studies revealed that asparagusic acid is derived from isobutyric acid. This colorless solid has a melting point (m.p.) of 75.7–76.5 °C. The corresponding dithiol (m.p. 59.5–60.5 °C) is also known; it is called dihydroasparagusic acid or dimercaptoisobutyric acid.
Over the past forty years several papers have been published on the subject, and several studies undertaken, to try and determine the chemical compounds responsible, and though there is still no definitive verdict as to the manner in which these compounds are formed, it has been suggested that they all form from…
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