What is "eupittone"

Eupittone \Eu*pit"tone\, n. [Pref. eu- + pittacal + -one.] (Chem.) A yellow, crystalline substance, resembling aurin, and obtained by the oxidation of pittacal; -- called also eupittonic acid. [Written also eupitton.]

n. (context organic compound English) A yellow crystalline substance, resembling aurin, obtained by the oxidation of pittacal; eupittonic acid.