A Neurotoxins.- 1 Isoquinoline Derivatives.- 2 TIQ Derivatives in the Human Central Nervous System.- 3 Animal Model of Parkinson’s Disease Prepared by N-Methyl-R-Salsolinol.- 4 Putative Endogenous Neurotoxins Derived from the Biogenic Amine Neurotransmitters.- 5 ?-Carboline Derivatives as Neurotoxins.- 6 Highly Halogenated Tetrahydro-?-Carbolines as a New Class of Dopaminergic Neurons.- 7 pros -Methylimidazoleacetic Acid: A Potential Neurotoxin in Brain?.- B Metabolism.- 8 Bioactivation of Azaheterocyclic Amines Via S-adenosyl-L-methionine-dependent N-methyltransferases..- 9 Tyrosine Hydroxylase: Biochemical Properties and Short-term Regulation In Vitro and In Vivo.- 10 Tyrosine Hydroxylase and Endogenous Neurotoxins.- 11 Monoamine Oxidase: Interaction with Isoquinoline Derivatives.- 12 Toxicity and Pharmacological Effects of Salsolinol in Different Cultivated Cells.