Catechin, taxifolin, and proanthocyanidin derivatives from Entada elephantina rhizome and their antimicrobial activity assessment

IF 2.6 3区 医学 Q3 CHEMISTRY, MEDICINAL Fitoterapia Pub Date : 2025-04-01 Epub Date: 2025-02-07 DOI:10.1016/j.fitote.2025.106417
Fazila Zulfiqar , Pankaj Pandey , Zulfiqar Ali , Yan-Hong Wang , Alvaro M. Viljoen , Amar G. Chittiboyina , Ikhlas A. Khan
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Abstract

Twenty-two compounds, predominantly catechin, taxifolin, and proanthocyanidin derivatives, were isolated and characterized from the methanol extract of Entada elephantina tuberous rhizomes. Five taxifolin-based metabolites, elephantinosides A–E (15) and one proanthocyanidin, elephantinoside F (19), were previously undescribed. Their structures were elucidated primarily based on 1D- and 2D-NMR and HRESIMS data. The absolute configuration of isolates was determined via NOESY NMR technique and experimental and calculated ECD analyses. None of the tested compounds 36, 810, 1317, and 19 exhibited antimicrobial activity against a panel of bacterial and fungal strains.

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大象根茎中儿茶素、杉木素和原花青素衍生物及其抑菌活性评价。
从象田块茎甲醇提取物中分离得到22个化合物,主要为儿茶素、杉木素和原花青素衍生物。五种基于taxifolin的代谢产物,象皮苷A-E(1-5)和一种原花青素,象皮苷F(19),先前被描述过。它们的结构主要是基于一维和二维核磁共振和HRESIMS数据进行的。通过NOESY核磁共振技术和实验及计算ECD分析确定了分离物的绝对构型。测试的化合物3- 6,8 - 10,13 -17和19对一组细菌和真菌菌株都没有表现出抗菌活性。
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来源期刊
Fitoterapia
Fitoterapia 医学-药学
CiteScore
5.80
自引率
2.90%
发文量
198
审稿时长
1.5 months
期刊介绍: Fitoterapia is a Journal dedicated to medicinal plants and to bioactive natural products of plant origin. It publishes original contributions in seven major areas: 1. Characterization of active ingredients of medicinal plants 2. Development of standardization method for bioactive plant extracts and natural products 3. Identification of bioactivity in plant extracts 4. Identification of targets and mechanism of activity of plant extracts 5. Production and genomic characterization of medicinal plants biomass 6. Chemistry and biochemistry of bioactive natural products of plant origin 7. Critical reviews of the historical, clinical and legal status of medicinal plants, and accounts on topical issues.
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