frangulinic acid

from The Collaborative International Dictionary of English v.0.48

Frangulic \Fran*gu"lic\, Frangulinic \Fran`gu*lin"ic\, a.
   (Chem.)
   Pertaining to, or drived from, frangulin, or a species
   ({Rhamnus Frangula}) of the buckthorn.
   [1913 Webster]

   {Frangulinic acid} (Chem.), a yellow crystalline substance,
      resembling alizarin, and obtained by the decomposition of
      frangulin.
      [1913 Webster]