What is "kynurenic"

Kynurenic \Ky`nu*ren"ic\, a. [Gr. ?, ?, dog + ? urine.] (Physiol. Chem.) Pertaining to, or designating, an acid obtained from the urine of dogs. By decomposition the acid yields a nitrogenous base (called kynurin) and carbonic acid. [Written also cynurenic.]

a. Of or pertaining to kynurenic acid or its derivatives