共查询到20条相似文献,搜索用时 15 毫秒
1.
S H Park S R Oh K Y Jung I S Lee K S Ahn J H Kim Y S Kim J J Lee H K Lee 《Chemical & pharmaceutical bulletin》1999,47(10):1484-1486
During a search for biologically active compounds from traditional medicines, a crude extract of Persicaria lapathifolia was found to have anti-complement activity. Bioassay-guided chromatographic separation of the active constituents led to the isolation of a new acylated kaempferol glycoside (1) and three known acylated quercetin glycosides (2-4). The structures of compounds 1-4 were characterized as kaempferol 3-O-beta-D-(6"-p-hydroxybenzoyl)-galactopyranoside, quercetin 3-O-beta-D-(6"-feruloyl)-galactopyranoside, quercetin 3-O-beta-D-(2"-galloyl)-rhamnopyranoside and quercetin 3-O-beta-D-(2"-galloyl)-glucopyranoside, respectively. Compounds 1-4 showed strong anti-complement activity (IC50 values of 4.3, 9.7, 3.9 and 7.6 x 10(-5) M, respectively) on the classical pathway of the complement. On the other hand, six isolated flavonol glycosides (5-10) did not show any activity on this system. 相似文献
2.
M. P. Yuldashev É. Kh. Batirov V. M. Malikov P. Kh. Yuldashev 《Chemistry of Natural Compounds》1994,29(3):303-305
Naringenin 7-O-(6-O-p-coumaroly--D-glucopyranoside) and the new flavanone naringenin 7-O-(2-O-p-coumaroyl--D-glucopyranoside) have been isolated from the seeds of Ricinus communis L. The structures of the compounds isolated were established on the basis of the results of chemical transformations and spectral characteristics.Institute of Chemistry of Plant Substances, Academy of Sciences of the Uzbekistan Republic, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 362–365, May–June, 1993. 相似文献
3.
Quach Thi Thanh Van Le Thi Vien Tran Thi Hong Hanh Phan Thi Thanh Huong Nguyen The Cuong Nguyen Phuong Thao 《Natural product research》2020,34(9):1276-1281
AbstractUsing various chromatographic separations, three new acylated flavonoid glycosides, namely barringosides G–I (1–3), were isolated from the water-soluble extract of Barringtonia racemosa branches and leaves. The structure elucidation was performed by extensive analysis of the 1D and 2D NMR and HR-QTOF-MS data. Of the isolated compounds, barringoside I (3) showed moderate inhibitory effects on LPS-induced NO production in RAW264.7 cells with an IC50 of 52.48?±?1.04?µM. 相似文献
4.
L. Pistelli C. Noccioli M. Martera L. Giamperi A. Bucchini D. Fraternale D. Ricci 《Chemistry of Natural Compounds》2006,42(3):281-284
Seven flavonol glycosides were isolated and identified from the aerial parts of Dorycnium hirsutum, together with catechin, D-pinitol, β-sitosterol, and stearic acid. The extracts and the isolated flavonol glycosides were
evaluated for their antioxidant activity, using the DPPH test (radical scavenging) and the lipoxygenase assay (lipid peroxidation).
Dedicated to the memory of Prof. I. Morelli.
Published in Khimiya Prirodnykh Soedinenii, No. 3, pp. 233–235, May–June, 2006. 相似文献
5.
Three new acylated quercetin rhamnosides have been isolated from the leaves and stem of Calliandra haematocephala Hassk. (Fabaceae) and their structures were established as quercitrin 2'-O-caffeate (1), quercitrin 3'-O-gallate (2) and quercitrin 2',3'-di-O-gallate (3). Also, 17 known compounds were identified as gallic acid (4), methyl gallate (5), caffeic acid (6), myricitrin (7), quercitrin (8), myricetin 3-O-beta-D-4C1-glucopyranoside (9), afzelin (10), isoquercitrin (11), myricetin 3-O-(6'-O-galloyl)-beta-D-glucopyranoside (12), myricitrin 2'-O-gallate (13), quercitrin 2'-O-gallate (14), afzelin 2'-O-gallate (15), myricitrin 3'-O-gallate (16), afzelin 3'-O-gallate (17), 1,2,3,4,6-penta-O-galloyl-beta-D-4C1-glucopyranose (18), myricitrin 2',3'-di-O-gallate (19), quercetin 3-O-methyl ether (20), for the first time from the genus Calliandra except for 6. Compounds 7, 8, 13, 14, 16 and 19 exhibited moderate to strong radical scavenging properties on lipid peroxidation, hydroxyl radical, superoxide anion generation and DPPH radical in comparison with that of quercetin as a positive control in vitro. Compounds 7 and 8 exhibited lethal effect towards brine shrimp Artemia salina. 相似文献
6.
M. P. Yuldashev É. Kh. Batirov V. M. Malikov P. Kh. Yuldashev 《Chemistry of Natural Compounds》1993,29(3):303-305
Naringenin 7-O-(6″-O-p-coumaroly-β-D-glucopyranoside) and the new flavanone naringenin 7-O-(2″-O-p-coumaroyl-β-D-glucopyranoside) have been isolated from the seeds of Ricinus communis L. The structures of the compounds isolated were established on the basis of the results of chemical transformations and spectral characteristics. 相似文献
7.
From the extracts of Dimocarpus longan Lour leaves, 2 unusual flavonol glycosides, quercetin 3-O-(3″-O-2?-methyl-2?-hydroxylethyl)-β-d-xyloside (1) and quercetin 3-O-(3″-O-2?-methyl-2?-hydroxylethyl)-α-l-rhamnopyranoside (2), as well as 10 known compounds including 2 flavonol glycosides, afzelin (3) and kaempferol-3-O-α-l-rhamnopyranoside (4), 2 flavans, ( ? )-epicatechin (5) and proanthocyanidin A-2 (6), 3 triterpenoids, friedelin (7), epifriedelanol (8) and β-amyrin (9), a peptide, N-benzoylphenylalanyl-N-benzoylphenylalaninate (10), and 2 sterols, β-sitosterol (11) and daucosterol (12) were isolated and identified by using combination of mass spectrometry and various 1D and 2D NMR techniques. This is the first report of flavonoid glycosides possessing a 2-methyl-2-hydroxylethoxyl group in sugar moiety from D. longan. 相似文献
8.
Two new acylated flavonol glycosides, named amurenosides A and B, together with quercetin 3-(2,6-di-O-alpha-rhamnopyranosyl-beta-galactopyranoside), have been isolated from the whole plant of Vicia amurensis. Their structures were elucidated as quercetin 3-O-alpha-L-(3-feruloylrhamnopyranosyl)(1-->6)-[alpha-L-rhamnopyra nosyl(1-->2)]-beta-D-galactopyranoside and quercetin 3-O-alpha-L-(2-feruloylrhamnopyranosyl)(1-->6)-[alpha-L-rhamnopyra nosyl(1-->2)]-beta-D-galactopyranoside on the basis of various NMR techniques, FAB mass spectrometry and chemical reactions. 相似文献
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10.
Shagufta Perveen Areej Mohammad Al-Taweel Nawal Al-Musayeib Ghada Ahmed Fawzy Afsar Khan Rashad Mehmood 《Natural product research》2015,29(7):615-620
Two new flavonol glycosides, brachysides C and D, together with three known flavonol glycosides, were isolated from the leaves of Caragana brachyantha. The structures of brachysides C and D were elucidated on the basis of detailed spectroscopic analysis as quercetin 5-O-[α-l-rhamnopyranosyl-(1 → 6)-β-d-glucopyranoside]-7-O-[α-l-rhamnopyranoside] and quercetin 5-O-[α-l-rhamnopyranosyl-(1 → 6)-β-d-glucopyranoside]-7-O-[α-l-rhamnopyranoside]-4′-O-[α-l-rhamnopyranoside], respectively. The presence of flavonol tetra- and triglycosides bearing a sugar moiety at position 5 was the first report from this genus Caragana. 相似文献
11.
Jayasinghe L Amarasinghe NR Arundathie BG Rupasinghe GK Jayatilake NH Fujimoto Y 《Natural product research》2012,26(8):717-721
Chemical investigation of the leaves of Elaeocarpus serratus yielded myricitrin (1), mearnsetin 3-O-β-D-glucopyranoside (2), mearnsitrin (3), tamarixetin 3-O-α-L-rhamnopyranoside (4) and the fruits of Filicium decipiens yielded three flavonol glycosides, kaempferol 3-O-rutinoside (5), kaempferol 3-O-robinobioside (6) and trifolin (7). Compound 1 showed strong antioxidant activity against DPPH. 相似文献
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15.
Summary Literature information on the structures of O-glycosides of flavones and flavonols has been generalized. Using the methods of combinatorial mathematics, the possibility of a great diversity of the structure of the glycosides has been shown without taking into account their acylation, the dimensions of the oxide rings of the sugars, and the nature of the glycosidic bonds.Pyatigorsk Pharmaceutical Institute. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 413–425, July–August, 1972. 相似文献
16.
G. M. Kitanov 《Chemistry of Natural Compounds》1988,24(3):390-391
Scientific Institute of Pharmacology and Pharmacy of the Medical Academy, Sofia. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 454–455, May–June, 1988. 相似文献
17.
Detailed chemical investigation of the herb Sarcopyramis bodinieri var. delicate resulted in the isolation of two new flavonol glycosides, namely, isorhamnetin-3-O-(6'-OE-feruloyl)-beta-D-glucopyranoside (1) and isorhamnetin-3-O-(6'-O-E-feruloyl)-beta-Dgalactopyranoside (2). In addition, four known compounds, quercetin-3-O-(6'-acetyl)-beta-Dglucopyranoside (3), isorhamnetin-3-O-(6'-acetyl)-beta-D-glucopyranoside (4), quercetin-3-O-(6'-O-E-p-coumaroyl)-beta-D-glucopyranoside (5), and isorhamnetin-3-O-(6'-O-E-pcoumaroyl)-beta-D-glucopyranoside (6) were obtained. The structures of the new isolates were determined by extensive spectroscopic analysis. 相似文献
18.
From the roots ethanol extract of Glehnia littoralis, two new lignan glycosides, named glehlinoside E (1) and F (2), were obtained. Their structures were determined to be (-)-secoisolariciresinol 4-O-β-D-(6-O-feruloyl) glucopyranoside (1) and (-)- secoisolariciresinol 4-O-f-β-D-(6-O-caffeloyl) glucopyranoside (2) by analysis of their spectral data, respectively. 相似文献
19.
O. A. Drozdova S. A. Avilov A. I. Kalinovskii V. A. Stonik Yu. M. Mil'grom Ya. V. Rashkes 《Chemistry of Natural Compounds》1994,29(3):309-313
Three new triterpene glycosides have been isolated from an alcoholic extract of the Pacific Ocean commercial holothurian Cucumaria japonica: cucumariosides A
T
1 (I), A
T
2 (II), and A
T
3 (III). The structures of these glycosides have been established by chemical and physical methods.Deceased.Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok. Institute of Chemistry of Plant Substances, Academy of Sciences of the Uzbekistan Republic, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 369–374, May–June, 1993. 相似文献
20.