title: Unsaturated steroids. Part I. Synthesis of 22,23-dihydroergosterol.
mesh_terms: D004875:Ergosterol / Q000031:analogs & derivatives* / Q000138:chemical synthesis*; D006865:Hydrogenation; D007536:Isomerism; D008722:Methods; D010084:Oxidation-Reduction
chemical_list: D004875:Ergosterol