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Sterols in vernonia anthelmintica seed

✍ Scribed by D. J. Frost; J. P. Ward

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
358 KB
Volume
89
Category
Article
ISSN
0165-0513

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✦ Synopsis

Abstract

The main sterol of Vernonia anthelmintica seed is 7,(Z)‐24(28)‐stigmastadienol (Ia). Stigmasterol and a C^29^‐sterol with a conjugated diene system, probably at C^8^ and C^14^, are also present, whilst GLC data indicate two other components to be 5‐stigmasten‐3β‐ol and 7,22‐stigmastadienol. A correlation of NMR data is given showing the stereochemistry at the ethylidene group of Ia and in related compounds.

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Vernodalidimers A and B, novel orthoeste
Vernodalidimers A and B, novel orthoester elemanolide dimers from seeds of Vernonia anthelmintica
✍ Yongqiang Liu; Alfarius E. Nugroho; Yusuke Hirasawa; Asami Nakata; Toshio Kaneda πŸ“‚ Article πŸ“… 2010 πŸ› Elsevier Science 🌐 French βš– 384 KB

Two novel elemanolide dimers, vernodalidimers A (1) and B (2), possessing a rare tricyclic ortho ester moiety, were isolated from the seeds of Vernonia anthelmintica. Their structures were elucidated by 1D and 2D NMR data and CD spectra. Vernodalidimers A (1) and B (2) exhibited potent cell growth i