title: (G- 3 H)Ergosterol; location of tritium in rings A and B.
mesh_terms: D002855:Chromatography, Thin Layer; D004875:Ergosterol / Q000138:chemical synthesis; D007553:Isotope Labeling; D013056:Spectrophotometry, Ultraviolet; D014316:Tritium; D014807:Vitamin D / Q000138:chemical synthesis*
chemical_list: D014316:Tritium; D014807:Vitamin D; D004875:Ergosterol