Quinolinic AcidQuinolinic AcidsReceptors, AngiotensinKynurenine3-Hydroxyanthranilate 3,4-DioxygenaseAngiotensin II3-Hydroxyanthranilic AcidPentosyltransferasesTryptophan OxygenaseTryptophanNeurotoxinsKynurenine 3-MonooxygenaseNicotinic AcidsHarmineKynurenic AcidNiacinCorpus StriatumTriosesNADIndoleamine-Pyrrole 2,3,-DioxygenaseHuntington DiseaseBrainPicolinic AcidsConvulsantsPyridines2-Amino-5-phosphonovalerateN-MethylaspartateDicarboxylic AcidsHydroxyindoleacetic AcidAspartic Acid