Ali, A A The heliangolide dihydrohirsutolide from Arctotis fastuosa and dichloromethyldihydrohirsutolide. [electronic resource] - Planta medica Aug 2000 - 585-7 p. digital Publication Type: Letter; Research Support, Non-U.S. Gov't ISSN: 0032-0943 Standard No.: 10.1055/s-2000-8608 doi Subjects--Topical Terms: Asteraceae--chemistryLactones--chemistryMolecular StructureSesquiterpenes--chemistrySpectrum Analysis