title: Conversions of alpha-methyl to alpha-methylene gamma-lactones. Synthesis of two allergenic sesquiterpene lactones, (-)-frullanolide and (+)-arbusculin B.
mesh_terms: D000485:Allergens / Q000138:chemical synthesis*; D007783:Lactones / Q000138:chemical synthesis; D008745:Methylation; D012717:Sesquiterpenes / Q000138:chemical synthesis*; D013237:Stereoisomerism
chemical_list: D000485:Allergens; D007783:Lactones; D012717:Sesquiterpenes; C006623:arbusculin B; C007787:frullanolide