Frangulic
Fran`gu´lic
a. 1. (Chem.) Pertaining to, or drived from, frangulin, or a species (Rhamnus Frangula) of the buckthorn.
Frangulinic acid
(Chem.) a yellow crystalline substance, resembling alizarin, and obtained by the decomposition of frangulin.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.