Polyprenylated acylphloroglucinols from Garcinia species and structural revision of seven analogues

IF 4.8 3区 化学 Q1 CHEMISTRY, MEDICINAL
Yong-Ge Fu, Yi-Qi Huang, Zhi-Hong Xu, Xia Liu, Xing-Wei Yang
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引用次数: 0

Abstract

Our continuous study of the fruits of Garcinia xanthochymus and Garcinia subelliptica led to the isolation and structural characterization of six new polyprenylated acylphloroglucinols, xanthochymusones N and O (1 and 2), (–)-garciyunnanin L (3), and garsubelones C–E (46), together with two known analogues. Their structures were elucidated by interpretation of NMR and MS spectroscopic data. It was found that the Grossman-Jacobs rule is no longer applicable to determination of the C-7 configuration of compounds 13, as they possess a complex 6/6/6/6/6 fused ring system. The inhibitory activities of all the compounds against two human hepatocellular carcinoma cell lines Huh-7 and HepG2 were evaluated, and compound 1 exhibited moderate cytotoxic activities against HepG2 cells with IC50 value 7.3 μM. Furthermore, the previous assignments of some polyprenylated acylphloroglucinols have been proved to be incorrect in this study, and analysis of NMR data enabled the structural revision of seven analogues: hyperselancins A and B, garcinielliptones F and G, garxanthochins A and B, and 13,14-didehydroxygarcicowin C. The revised structures of garcinielliptone F and garxanthochin A were shown to have the same structures of garsubelone B and xanthochymusone K, respectively, and the revised structures of other five compounds have not been reported.

Graphical abstract

藤黄属植物的聚丙烯基间苯三酚及其7个类似物的结构修正
我们对黄花藤黄和黄花藤黄的果实进行了持续的研究,分离并鉴定了6种新的聚丙烯基间苯三酚,黄花藤黄素N和O(1和2),(-)-garciyunnanin L(3)和garsubelones C-E(4-6),以及两种已知的类似物。通过核磁共振和质谱数据对其结构进行了分析。发现Grossman-Jacobs规则不再适用于化合物1-3的C-7构型的测定,因为它们具有6/6/6/6/6 /6的络合物环体系。结果表明,化合物1对人肝癌细胞株Huh-7和HepG2具有中等的细胞毒活性,IC50值为7.3 μM。此外,在本研究中,一些聚戊烯酰化酰基间苯三酚的先前分配被证明是不正确的,并且通过核磁共振数据的分析,可以对七个类似物进行结构修正:结果表明,garcinielliptone F和G、garxanthochins A和garxanthochins B和13,14- didehydroxygarcicoin c的修饰结构分别与garsubelone B和xanthochinone K具有相同的结构,其他5个化合物的修饰结构未见报道。图形抽象
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来源期刊
Natural Products and Bioprospecting
Natural Products and Bioprospecting CHEMISTRY, MEDICINAL-
CiteScore
8.30
自引率
2.10%
发文量
39
审稿时长
13 weeks
期刊介绍: Natural Products and Bioprospecting serves as an international forum for essential research on natural products and focuses on, but is not limited to, the following aspects: Natural products: isolation and structure elucidation Natural products: synthesis Biological evaluation of biologically active natural products Bioorganic and medicinal chemistry Biosynthesis and microbiological transformation Fermentation and plant tissue cultures Bioprospecting of natural products from natural resources All research articles published in this journal have undergone rigorous peer review. In addition to original research articles, Natural Products and Bioprospecting publishes reviews and short communications, aiming to rapidly disseminate the research results of timely interest, and comprehensive reviews of emerging topics in all the areas of natural products. It is also an open access journal, which provides free access to its articles to anyone, anywhere.
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