doi: 10.1021/np50098a011.
New sesquiterpene alpha-methylene lactones from the Egyptian plant Jasonia candicans
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- PMID: 8229012
- DOI: 10.1021/np50098a011
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New sesquiterpene alpha-methylene lactones from the Egyptian plant Jasonia candicans
J Nat Prod.
1993 Aug.
Abstract
Extracts of the plant Jasonia candicans possess antimicrobial activity. ET2O/MeOH extracts were subjected to liquid chromatography, and several sesquiterpenes were isolated and identified including the known compounds confertin [1], 4,11(13)-eudesmadien-12-oic acid [2], and 11-eudesmen-4-ol [3]. Two new diol alpha-methylene lactone antimicrobial agents were identified from nmr and mass spectral data and X-ray crystallography as (4 alpha, 5 alpha, 8 beta, 10 beta)-4,10-dihydroxy-1,11(13)-guaidien-12,8-olide [4] and (4 alpha, 5 alpha, 8 beta, 10 alpha)-4,10-dihydroxyl-1,11 (13)-guaidien-12,8-olide[5], which differ in stereochemistry at the C-10 tertiary alcohol center.
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