title: The constitution of kappa-santonin; a study of the butenolide system.
mesh_terms: D015107:4-Butyrolactone / Q000031:analogs & derivatives; D006801:Humans; D012500:Santonin
chemical_list: D012500:Santonin; C004511:butenolide; D015107:4-Butyrolactone
keywords: SANTONIN