Definition: The inner anhydride or lactone of santoninic acid, obtained from santonica, the unexpanded flower heads of Artemisia cina and other species of Artemisia (family Compositae); has been used to effect expulsion of roundworms (Ascaris lumbricoides), and in the treatment of urinary incontinence.
[G. santonikon, wormwood]
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Examples: glitazone, GI cocktail, etc.