title: Cycloadducts of ergosterol with azo-type dienophiles, and their chemical reactivities.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D004875:Ergosterol; D011724:Pyridazines; D014807:Vitamin D
chemical_list: D011724:Pyridazines; D014807:Vitamin D; D004875:Ergosterol