Planta Med 2000; 66(6): 541-544
DOI: 10.1055/s-2000-8607
Original Paper
Georg Thieme Verlag Stuttgart · New York

New Antimicrobial Mono- and Sesquiterpenes from Soroseris hookeriana Subsp. erysimoides

J. C. Meng1 , Q. X. Zhu2 , R. X. Tan1,*
  • 1 Institute of Functional Biomolecule, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, People's Republic of China
  • 2 State Key Laboratory for Applied Organic Chemistry at Lanzhou University, Lanzhou, People's Republic of China
Further Information

Publication History

Publication Date:
31 December 2000 (online)

Abstract

A new monoterpene and a new guaianolide were isolated from the aerial parts of the Tibetan medicinal plant Soroseris hookeriana subsp. erysimoides (Asteraceae), in addition to (1R,4R,5R)-5-hydroxybornan-2-one 5-O-β-D-glucopyranoside, β-sitosterol, daucosterol, diosmetin, isoluteolin, p-methoxybenzoic acid, isovanillic acid, two phenylmethanol derivatives (vanilloloside and phenylmethanol glucopyranoside), and five guaianolides [3β,8β-dihyroxyguaia-4(15),10(14),11(13)-triene-12,6α-olide, dentalactone, 10α-hydroxy-8-deoxy-10,14-dihydrodeacylcinaropicrin, glucozaluzanin C and 8-epideacylcinaropicrin glucoside]. By a combination of spectroscopic methods (IR, EI-MS, 1H- and 13C-NMR, and DEPT), the structure of the new guaianolide was established as 3β,8β-dihydroxy-11αH-guaia-4(15),10(14)-diene-12,6α-olide, and that of the new monoterpene as (1R,4R,5R)-5-benzoyloxybornan-2-one. The antimicrobial activity of all isolates except the two sterols were measured using Escherichia coli, Bacillus subtilis, Staphylococcus aureus, Candida albicans, Aspergillus niger, and Trichophyton rubrum as test microorganisms. The new guaianolide was shown to be equally active (MIC: 50 μg/ml) against E. coli, B. subtilis and A. niger. The new monoterpene inhibited exclusively the growth of B. subtilis with MIC at 25 μg/ml. p-Methoxybenzoic acid and isovanillic acid were inhibitory against A. niger (MIC: 25 μg/ml), the latter being also active against B. subtilis with MIC at 25 μg/ml. The flavonoids diosmetin and isoluteolin almost equally inhibited the growth of B. subtilis (MIC: 25 μg/ml) and the human pathgenic fungus T. rubrum (MIC: 50 μg/ml).

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Prof. R. X. Tan

School of Life Sciences Nanjing University

Nanjing 210093

P.R. China

Email: rxtan@netra.nju.edu.cn

Phone: & +86 25 359 3201