Irradiation of friedelan-21-ones: Structure determination of novel friedelane triterpenes from kokoona zeylanica

A. A.Leslie Gunatilaka, N. P.Dhammika Nanayakkara, M. Uvais S. Sultanbawa

Research output: Contribution to journalArticle

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Formation of the photoproducts (10) and (12) and chemical and spectroscopic evidence suggest that kokoononol obtained from Kokoona zeylanica is 27-hydroxyfriedelane-3,21-dione (1); kokoondiol and kokoonol have been identified as 21α,27-dihydroxyfriedelan-3-one (2) and 27-hydroxyfriedelan- 3-one (3), respectively, by chemical conversions.

Original languageEnglish (US)
Pages (from-to)434-436
Number of pages3
JournalJournal of the Chemical Society, Chemical Communications
Issue number10
StatePublished - Dec 1 1979
Externally publishedYes


ASJC Scopus subject areas

  • Molecular Medicine

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