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ZhiZhiDU NaZHU YueMaoSHEN 《中国化学快报》2003,14(7):707-710
Antifungal assay-guided isolation of the ethanol extract of the aerial parts of Clematis tangutica yielded two novel triterpene saponins. Their structures were determined to be 3-O-α-L-arabinopyranosyl hederagenin 28-O-α-L-rhamnopyranosyl ester (1) and 3-O-β-D-glucopyranosyl-(1→4)-α-L-arabinopyranosyl hederagenin 28-O-α-L-rhamnopyranosyl ester (2) on the basis of spectral data and chemical reactions. 相似文献
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Hasan Kırmızıbekmez Yiğit İnan Rengin Reis Hande Sipahi Ahmet C. Gören Erdem Yeşilada 《Natural product research》2019,33(17):2541-2544
Phytochemical investigations on the EtOH extract of Clematis viticella led to the isolation of six flavonoid glycosides, isoorientin (1), isoorientin 3′-O-methyl ether (2), quercetin 7-O-α-L-rhamnopyranoside (3), quercetin 3,7-di-O-α-L-rhamnopyranoside (4), manghaslin (5) and chrysoeriol 7-O-β-D-glucopyranoside (6), one phenylethanol derivative, hydroxytyrosol (7), along with three phenolic acids, caffeic acid (8), (E)-p-coumaric acid (9) and p-hydroxybenzoic acid (10). The structures of the isolates were elucidated on the basis of NMR and HR-MS data. All compounds were isolated from C. viticella for the first time. Compounds 7 and 8 showed significant anti-inflammatory activity at 100 μM by reducing the release of NO in LPS-stimulated macrophages comparable to positive control indomethacin. Compounds 3 and 7 exhibited anti-inflammatory activity through lowering the levels of TNF-α while 1, 3 and 5 decreased the levels of neopterin better than the positive controls. 相似文献
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以铁线莲品种繁星(Clematis' nelly moser’)的带节茎段为材料,研究不同光照强度和光质对铁线莲不定芽繁殖的影响.以MS为基本培养基(含有0.2 mg/L 1-萘乙酸和2 mg/L 6-苄氨基腺嘌呤),设置光照强度梯度为0、500、2 000、3 000和4 000 Lux的白光光照;用透明玻璃纸得到蓝(440 nm)、绿(560 nm)、红(650 nm)3种光质,以白光为对照组,强度均为3 000 Lux.结果表明:在光照强度为3 000 Lux的白光光照下,不定芽的诱导效果最好,其诱导频率和每个外植体上不定芽的数量分别为100%和4.4,每个外植体上不定芽的平均高度为5.66cm,平均节数为4.6个;蓝光能够显著提高不定芽的诱导数量,是相同光强白光诱导数量的1.27倍,蓝光下不定芽SOD和CAT的最大值显著高于其它光质下的数值,且叶绿素a和b的比值最大. 相似文献
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Kai-Hui Sun Xin-Hua Ma Xian-Ming Zeng Zhong-Yue Lin Yu-Mei Cai Hai-Tao Zhang 《Natural product research》2019,33(20):2925-2931
One new indole-type alkaloid, α-L-rhamnopyranosyl-(1→6)-β-D- glucopyranosyl 6-methoxy-3-indolecarbonate (1), together with three known alkaloids (2–4), one aromatic acid (5) and five known saponins (6–10), was isolated from the roots of Clematis florida var. plena. Their structures were established by NMR spectroscopic analysis and acid hydrolysis. In in vivo anti-inflammatory activity, n-butanol extract was found to be potent against ear edema in mice, with inhibition rate of 48.7% at a dose of 800?mg/kg. Furthermore, compounds 8 and 9 obtained from the n-butanol extract exhibited significant anti-inflammatory activities with inhibition rates of 50.9% and 54.7% at a dose of 200?mg/kg. 相似文献
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First separation of four aromatic acids and two analogues with similar structures and polarities from Clematis akebioides by high‐speed counter‐current chromatography 下载免费PDF全文
Chengcheng Gong Tao Chen Huifeng Chen Shanshan Zhang Xinzhu Wang Weiqing Wang Jing Sun Yulin Li Zhixin Liao 《Journal of separation science》2016,39(23):4660-4666
In this paper, we report an efficient method by high‐speed counter‐current chromatography for the first separation of four aromatic acids and two analogs with similar structures and polarities from Clematis akebioides. First, the ethyl acetate extract was treated by silica gel column chromatography to enrich the target compounds. And then the fraction with target compounds were purified by high‐speed counter‐counter chromatography using a two‐phase solvent system consisting of chloroform/acetonitrile/water (10:6:4, v/v). The results showed high‐speed counter‐current chromatography could be a powerful technology for the separation of compounds with similar structures and polarities. Besides, it was found acetonitrile could be a good methanol substitute when a chloroform/methanol/water system could not provide a good separation factor. This study provides a reference for the separation of compounds from Clematis akebioides. 相似文献
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Ehsan Karimi Meisam Habibi Mahdi Ebrahimi Ali Mehrafarin Farahnaz Khalighi-Sigaroodi 《Natural product research》2018,32(16):1991-1995
The antioxidant activities of crude extract fractions using Hexane, Chloroform, Ethyl Acetate, Butanol and Water of Clematis orientalis and Clematis ispahanica were investigated. 1,1-diphenyl-2-picryl-hydrazyl (DPPH) assay and the ferric reducing/antioxidant potential (FRAP) were used to evaluate the antioxidant capacity. The total phenolics were found to be 4.37–9.38 and 1.32–11.37 mg gallic acid equivalents (GAE)/g in different fractions for C. orientalis and C. ispahanica, respectively. The ethyl acetate fraction of C. orientalis and chloroform fraction of C. ispahanica showed the highest DPPH and FRAP activities at a concentration of 300 μg/mL. The predominant phenolic compounds identified by HPLC in C. orientalis were Resorcinol (603.5 μg/g DW) in chloroform fraction and Ellagic acid (811.7 μg/g DW) in chloroform fraction of C. ispahanica. 相似文献
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One new flavonol glycoside named terniflonoside A (1) and four known flavonol glycosides were isolated from the whole plants of Clematis terniflora. The structure was determined by 1D and 2D NMR, ESI-MS techniques, and chemical methods.
Published in Khimiya Prirodnykh Soedinenii, No. 2, pp. 108–110, March–April, 2007. 相似文献
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Three new phenolic glycosides, clemomandshuricosides A–C ( 1 – 3 , resp.) and two new D ‐ribono‐γ‐lactone derivatives, 4 and 5 , were isolated from the roots and rhizomes of Clematis mandshurica Rupr ., together with six known compounds. Their structures were elucidated on the basis of chemical, physicochemical, and spectroscopic evidence. 相似文献
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Feng Sun Qing He Yi Yu Cheng Pharmaceutical Informatics Institute College of Pharmaceutical Sciences Zhejiang University Hangzhou China Pei Gen Xiao Institute of Medicinal Plant Development Chinese Academy of Medical Sciences Beijing China 《中国化学快报》2007,18(9):1078-1080
A new triterpenoid saponin,named clematiganoside A(1),was isolated from the whole plant of Clematis ganpiniana.Its structure was elucidated on the basis of 1D,2D NMR,TOF-MS and ESI-MS techniques,and physicochemical properties. 相似文献