期刊
BIOCHEMICAL SYSTEMATICS AND ECOLOGY
卷 70, 期 -, 页码 291-293出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bse.2016.12.016
关键词
Asteraceae; Caffeoylquinic acids; Espeletiinae; Espeletia barclayana; Flavonoids
资金
- CAPES
- CNPq
- FAPESP [2014/17702-0, 2014/26866-7]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [14/26866-7] Funding Source: FAPESP
This work describes the isolation of seven (1-7) secondary metabolites from Espeletia barclayana (Asteraceae, Espeletiinae) and their identification by spectroscopic (NMR) and spectrometric (MS) techniques. Ten (8-17) additional compounds were identified based on their retention times, high-resolution mass spectrometry data, and comparison with reference substances or data from literature. The systematic significance of some of the identified substances - the sesquiterpene lactone longipilin acetate, four caffeoylquinic acids and two tri-caffeoylaltraric acids - is discussed with the aim of providing insights into the complex relationships among Espeletiinae taxa and its closest relatives. Five of the isolated metabolites [5-O-(E)-caffeoylquinic acid (1), 1,3-di-O-(E)-caffeoylquinic acid (2), 1,5-di-O-(E)-caffeoylquinic acid (3), 3,4-di-O-(E)-caffeoylquinic acid (4) and 3-O-methylquercetin 7-O-beta-glucopyranoside (7)] constitute new reports for the genus Espeletia and for the subtribe Espeletiinae. Chemical data suggest that Espeletiinae might have a closer relationship with Smtlllanthus than with Ichthyothere, i.e., the two genera suggested to be the sister groups of Espeletiinae based on molecular markers. (C) 2017 Elsevier Ltd. All rights reserved.
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