Structure of ergolide

The epigeal part ofErigeron khorassanicus Boiss. has yielded a new sesquiterpene lactone of the pseudoguaiane type — ergolide C₁₇H₂₂O₅, mp 179–180°C (ethanol) ] _D ²⁰ +123° (c 4.88; ethanol). On the basis of chemical transformations and spectral characteristics, its structure and configuration have been established as 6-acetoxy-4-oxo-1,7H,6,8,10H-pseudoguai-11(13)-en-8,12-olide.Institute of the Chemistry of Plant Substances of the Uzbek Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 568–571, September–October, 1986.