Quinolinic AcidQuinolinic AcidsKynurenineKynurenic Acid3-Hydroxyanthranilate 3,4-Dioxygenase3-Hydroxyanthranilic AcidPentosyltransferasesTryptophanKynurenine 3-MonooxygenaseTryptophan OxygenaseNeurotoxinsNicotinic AcidsHarmineNiacinCorpus StriatumTriosesNADIndoleamine-Pyrrole 2,3,-DioxygenaseHuntington DiseaseBrainPicolinic AcidsConvulsantsN-Methylaspartate2-Amino-5-phosphonovalerate