A NEW SESQUITERPENE KETO–LACTONE FROM SENECIO

Abdel–Azim M. Habib; Ali M. Metwally

doi:10.1055/s-0028-1099416

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Planta Med 1973; 23(1): 88-93
DOI: 10.1055/s-0028-1099416

A NEW SESQUITERPENE KETO–LACTONE FROM SENECIO

Abdel–Azim M. Habib, Ali M. Metwally

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Publication Date:
14 January 2009 (online)

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Abstract

A new sesquiterpene lactone (C₁₆H₂₂O₄, m. p. 235–8, [α]²⁹ _D – 94.5°) was isolated from Senecio aegyptius. The new lactone was proved by chemical and spectral means to have a γ–lactone ring structure, a secondary hydroxyl group, a ketonic carbonyl and a terminal méthylène group conjugated with the lactone. The acetyl derivative and the oxime were prepared and some physical and chemical data are given for them.