kynurenic and its Impurities

Kynurenic acid possesses neuroactive activity. It acts as an anti excitotoxic and anticonvulsant, most likely through acting as an antagonist at excitatory amino acid receptors. It is a product of the normal metabolism of amino acid L-tryptophan. Reference standards of Kynurenic API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.