1 Chemistry of Glycosphingolipids.- 1.1. Introduction.- 1.1.1. Classification and Nomenclature of Glycosphingolipids.- 1.1.2. Brief History of the Chemistry of Glycosphingolipids.- 1.2. Isolation of Glycosphingolipids.- 1.2.1. Extraction.- 1.2.2. Purification of Lipid Extract: Elimination of Nonlipid Contaminants.- 1.2.3. Separation of Gangliosides and Long-Chain Neutral Glycolipids.- 1.2.4. Separation of Individual Glycolipids.- 1.3. Characterization of Glycosphingolipids.- 1.3.1. Analysis by Thin-Layer Chromatography.- 1.3.2. Characterization of Ceramide Structure, Fatty Acids, and Long-Chain Bases.- 1.3.3. Determination of Carbohydrate Composition.- 1.3.4. Release of Oligosaccharides from Glycosphingolipids.- 1.3.5. Determination of Carbohydrate Sequence.- 1.3.6. Determination of the Position of Glycosyl Linkages.- 1.3.7. Determination of Anomeric Configuration (a or ?) in Glycolipids by Chromium Trioxide Oxidation.- 1.3.8. Direct-Probe Mass Spectrometry of Glycolipids.- 1.3.9. Spectrometric Analysis of Glycosphingolipids: Infrared (IR), Nuclear Magnetic Resonance, and Electron Spin Resonance Spectra.- 1.4. Structure of Glycosphingolipids.- 1.4.1. Structural Variation in Ceramides.- 1.4.2. Simpler Glycosphingolipids: Ceramide Monohexosides, Ceramide Dihexosides, and Sulfatides.- 1.4.3. Globo-Series Glycolipids.- 1.4.4. Lacto-Series Glycolipids.- 1.4.5. Muco-Series Glycolipids: Glycolipids with Digalactosyl to Hexagalactosyl Core Structure.- 1.4.6. Simpler Gangliosides and Hematosides: Sialosyl Glycolipids without Hexosamines.- 1.4.7. Ganglio-Series Glycolipids: Gangliosides with Ganglio-N- triose, Ganglio-N-tetraose, and Ganglio-N-pentaose Structure.- 1.4.8. Glycosphingolipids of Water-Living Invertebrates.- 1.4.9. Plant Sphingolipids (Phytoglycosphingolipids).- 1.5. Chemical Synthesis and Modification of Sphingosines and Glycosphingolipids.- 1.5.1. Synthesis of Long-Chain Bases.- 1.5.2. Synthesis of Glycosphingolipids.- 1.6. Pioneers in Glycolipid Chemistry.- 1.lÓU