The Medicinal Chemistry of Natural and Semisynthetic Compounds against Parkinson's and Huntington's Diseases

CNS; Dementia; Huntington's disease; natural products; Parkinson's disease; semisynthetic compounds; Animals; Anti-Dyskinesia Agents; Antioxidants; Antiparkinson Agents; Autophagy; Biological Products; Dementia; Dopamine; Drug Discovery; Drug Evaluation, Preclinical; Humans; Huntington Disease; Microglia; Mitochondria; Molecular Targeted Therapy; Monoamine Oxidase Inhibitors; Oxidative Stress; Parkinson Disease; Plant Preparations; Protein Aggregation, Pathological; Signal Transduction; alpha-Synuclein