lysergic acid

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lysergic acid (uncountable)

  1. (organic chemistry) An organic compound, 6-methyl-9,10-didehydro-ergoline-8-carboxylic acid, derived from an alkaloid found in ergot; its amide derivatives are widely used as pharmaceuticals and as hallucinogenic drugs (LSD).
    • 1934 January 22, Walter A. Jacobs, “The Ergot Alkaloids: II. The degrataion of ergotinine with alkali lysergic acid”, in J. Biol. Chem., page 547:
      However, a new substance was obtained in good yield on gentle acidification, which possessed both acid and basic properties and which we have named lysergic acid.