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apigenin

n. (context organic compound English) A flavone, that exists as a glycoside in many plants, that reverses the adverse effects of cyclosporine

Wikipedia
Apigenin

Apigenin (4′,5,7-trihydroxyflavone), found in many plants, is a natural product belonging to the flavone class that is the aglycone of several naturally occurring glycosides. It is a yellow crystalline solid that has been used to dye wool.