共查询到20条相似文献,搜索用时 31 毫秒
1.
Li WH Zhang XM Tian RR Zheng YT Zhao WM Qiu MH 《Journal of Asian natural products research》2007,9(6-8):551-555
A new lupane acid, 2beta-carboxyl,3beta-hydroxyl-norlupA (1)-20 (29)-en-28-oic acid (1), together with five known lupane acid derivatives (2-6), were isolated from the stings of Gleditsia sinensis Lam.. Their structures were elucidated on the basis of 1D and 2D NMR techniques. All these known compounds were isolated from this genus for the first time. The new compound 1 showed strong anti-HIV activity. 相似文献
2.
Duan LX Feng BM Chen F Liu JY Li F Wang YQ Pei YH 《Journal of Asian natural products research》2007,9(6-8):557-561
A new disulfide glycoside, raphthioglucoside (1), and a new sinapic acid derivative, sinapic acid 5-hydroxymethylfurfural ester (2), together with sinapic acid (3) have been isolated from the seeds of Raphanus nussatirus L. The structures of compounds 1-3 were determined based on chemical analysis and spectroscopic methods (UV, 1D and 2D NMR, HRFABMS, HREIMS and elemental analysis). 相似文献
3.
Wan-Hua Li Xiang-Ming Zhang Rong-Ren Tian Yong-Tang Zheng Wen-Ming Zhao Ming-Hua Qiu 《Journal of Asian natural products research》2007,9(6):551-555
A new lupane acid, 2β-carboxyl,3β-hydroxyl-norlupA (1)-20 (29)-en-28-oic acid (1), together with five known lupane acid derivatives (2-6), were isolated from the stings of Gleditsia sinensis Lam.. Their structures were elucidated on the basis of 1D and 2D NMR techniques. All these known compounds were isolated from this genus for the first time. The new compound 1 showed strong anti-HIV activity. 相似文献
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5.
A new diterpene glycoside, acantrifoside D ( 1), as well as three known diterpenes (2 - 4) were isolated from the stem bark of Acanthopanax trifoliatus from Vietnam. Based on 1D and 2D NMR spectroscopic data, their chemical structures were determined to be 16alpha,17-dihydroxy- ent-kauran-19-oic acid 16- O-beta- D-glucopyranoside 19- O-beta- D-glucopyranosyl ester (1), 16alpha H,17-isovalerate- ent-kauran-19-oic acid (2), ent-kaur-16-en-19-oic acid ( 3), and ent-pimara-8(14),15-dien-19-oic acid (4). Compounds 2 - 4 had strong inhibitory effects against COX-1 in an in vitro assay, with IC50 values of 0.21, 0.15 and 0.19 mM, respectively. 相似文献
6.
Three new sulfated triterpenoids (1-3), along with one known compound (4), were isolated from the roots of Gypsophila pacifica Kom. The structures of the new compounds were established as 3β-O-sulfate gypsogenin 28-O-β-d-glucopyranosyl ester (1), 3β-O-sulfate gypsogenin (2), and 3β-O-sulfate quillaic acid (3) on the basis of 1D, 2D NMR, and HR-ESI-MS methods. 相似文献
7.
Jiang C Liu ZH Li L Lin BB Yang F Qin MJ 《Journal of Asian natural products research》2012,14(5):491-495
A new eudesmane sesquiterpene glycoside, ophiopogonoside B (1), along with five known compounds, ophiopogonoside A (2), ruscogenin-1-O-[β-D-glucopyranosyl (1 → 2)]-[β-D-xylopyranosyl (1 → 3)]-β-D-fucopyranoside (3), palmitic acid (4), palmitic acid glyceride (5), and β-sitosterol-D-glucopyranoside (6),was isolated from the tuberous roots of Liriope muscari (Decn.) Bailey (Liliaceae). Their structures were confirmed by 1D and 2D NMR spectroscopy. Among them, compounds 1, 2, 4, and 5 were the first reported from the genus Liriope. Ophiopogonoside B (1) showed moderate inhibitory activity to glycogen phosphorylase a. 相似文献
8.
Diterpenoids from the freshwater green algae Rhizoclonium hieroglyphicum with antibacterial activity
Three new isopimarane diterpenes 7β-hydroxy-19α-methylmalonyloxy-isopimara-8(14),15-diene (1), 7β-hydroxy-14-oxo-isopimara-8(9),15-dien-19oic acid (2), and 7β-hydroxy-14-oxo-19α-methylmalonyloxy-isopimara-9(11),15-diene (3) in addition to the known compounds isopimaric acid (4), 7oxo-13-epi-pimara-14,15-dien-18oic acid (5), 7oxo-13-epi-pimara-8,15-dien-18oic acid (6), and 6β-hydroxyisopimaric acid (7) were isolated from the hexane extract of Rhizoclonium hieroglyphicum. The structures of compounds 1-7 were established by 1D and 2D NMR techniques. The isolated diterpenoids were screened for antimicrobial activity against gram-positive and gram-negative bacteria and yeast strains. 相似文献
9.
To study the chemical constituents of Drynariae Rhizoma, nine phenolic acids were isolated from a 70% ethanol extract by using a combination of various chromatographic techniques including column chromatography over silica gel, ODS, Sephadex LH-20, and semi-preparative HPLC. By spectroscopic techniques including 1H NMR, 13C NMR, 2D NMR, and HR-ESI-MS, these compounds were identified as 4, 4'-dihydroxy-3, 3'-imino-di-benzoic acid (1), protocatechuic acid (2), gallic acid (3), p-hydroxybenzoic acid (4), (E)-caffeic acid (5), ethyl trans-3, 4-dihydroxycinnamate (6), caffeic acid 4-O-beta-D-glucopyranoside (7), p-coumaric acid 4-O-beta-D-glucopyranoside (8), and 23(S)-12-O-caffeoyl-12-hydroxyllauric acid glycerol ester (9), separately. Among them, 1 and 9 are new compounds, and 3, 4, and 6 were isolated from Drynaria species for the first time. 相似文献
10.
目的 从西双版纳粗榧内生真菌菌株Aspergillus sp. CM112中分离和鉴定抗菌活性产物。方法 采用反相硅胶色谱、凝胶色谱和HPLC等分离技术,对菌株CM112的发酵产物进行分离纯化;通过1D、2D NMR、HR-ESI-MS以及旋光数据进行结构测定。结果 鉴定了5个bisabolane型倍半萜的结构,包括两个新化合物(7S,11S)-(+)-11-hydroxyl-sydonol(1)和(7S,11S)-(+)-11-hydroxyl aspergiterpenoid A(2)以及3个已知化合物(7S,11S)-(+)-11-hydroxysydonic acid(3), (7S,11S)-(+)-11,12-dihydroxysydonic acid (4)和(7S,11S)-(+)-12-hydroxysydonic acid(5);并通过纸片扩散法测试了它们对3株病原细菌的抗菌活性。结论 化合物1和2是新的bisabolane型倍半萜,2和3为抗菌活性成分。 相似文献
11.
采用多种色谱技术从怀菊花茎叶中分离得到8个聚炔类化合物。通过UV、IR、ESI-MS、HR-ESI-MS及NMR等波谱技术对其进行结构鉴定,分别为菊花新炔C (2E,4E,12Z-十四碳三烯-1-吡咯烷基-1-酮-8,10-二炔)(1)、tetradeca-2E, 4E, 12E-trien-8, 10-diynoic acid pyrrolidide (2)、tetradeca-2E, 4E-dien-8, 10-diynoic acid pyrrolidide (3)、tetradeca-2E,4E,10Z-trien-8-ynoic acid pyrrolidide (4)、2E,4E,12E-tetradecatriene-8,10-diynoic acid isobutylamide (5)、2E,4E-undecyldiene-8,10-diynoic acid isobutylamide (6)、2E,4E,10E-N-isobutyl-2,4,10-tetradecatrien-8-ynoic acid amide(7)和十一-2E,4E-二烯-8,10-二炔酸苯乙胺(... 相似文献
12.
目的 研究褐藻羊栖菜Sargassum fusiforme的化学成分。方法:采用大孔吸附树脂柱色谱、硅胶柱色谱、ODS柱色谱和制备HPLC等技术方法进行化学成分分离,运用核磁共振波谱和质谱等数据,并结合文献鉴定化合物的结构。结果:从羊栖菜乙醇提取物中分离得到10个化合物,分别鉴定为对羟基苯甲醛(1)、2,5-二羟基苯甲醛(2)尿黑酸(3)、尿黑酸乙酯(4)、对羟基苯甲酸(5)、5-乙氧基甲基尿嘧啶(6)、黑麦草内酯(7)、异黑麦草内酯(8)、schiffnerilolide(9)、焦谷氨酸乙酯(10)。结论:化合物1~10为首次从羊栖菜中分离得到。 相似文献
13.
A new pancreatic lipase inhibitor isolated from the roots of <Emphasis Type="Italic">Actinidia arguta</Emphasis> 总被引:1,自引:1,他引:0
A new coumaroyl triterpene, 3-O-trans-p-coumaroyl actinidic acid (1), as well as five known triterpenes, ursolic acid (2), 23-hydroxyursolic acid (3), corosolic acid (4), asiatic acid (5) and betulinic acid (6) were isolated from an EtOAc-soluble extract of the roots of Actinidia arguta. The structure of compound 1 was elucidated from interpretation of the spectroscopic data, particularly by extensive 1D and 2D NMR studies. All the isolates (1-6) were evaluated in vitro for their inhibitory activities on pancreatic lipase (PL). Of the isolates, the new compound 1 possessed the highest inhibitory activity on PL, with an IC(50) of 14.95 microM, followed by ursolic acid (2, IC(50) = 15.83 microM). The other four triterpenes (3-6) also showed significant PL inhibitory activity, with IC(50) values ranging from 20.42 to 76.45 microM. 相似文献
14.
Sheng-Hong Li Hong-Jie Zhang Ping Yao Xue-Mei Niu Wei Xiang Han-Dong Sun 《Journal of Asian natural products research》2013,15(2):147-154
From the bark of Taxus yunnanensis , 15 non-taxane compounds were isolated. Through spectroscopic methods such as 1D and 2D NMR and MS experiments, one of them was determined as a new abietane-type diterpenoid named taxayunnin ( 1 ). The other 14 known compounds were identified as taxamairin C ( 2 ), taxamairin A ( 3 ), 3 g -hydroxy-sandaracopimaric acid ( 4 ), (+)-3-hydroxy-isodrimenin ( 5 ), rubrosterone ( 6 ), ponasterone A ( 7 ), ecdysterone ( 8 ), 20-hydroxy-echysone-20,22-monoacetonide ( 9 ), 7-oxositosterol ( 10 ), stigmast-4-en-6 g -ol-3-one ( 11 ), 5 f ,6 g -dihydroxy-daucosterol ( 12 ), g -sitosterol ( 13 ), daucosterol ( 14 ), 1- O - g - d -glucopyranosyl-(2 S , 3 R , 4 E , 8 Z )-2- N -(2'-hydroxypalmitoyl)-octadeca-sphinga-4,8-dienine ( 15 ), respectively. Compounds 4 - 6 , 9 - 12 and 15 were isolated from Taxus plants for the first time. 相似文献
15.
The fungus Epicoccum sp., was isolated from the marine brown alga Fucus vesiculosus. After cultivation the fungus was investigated for its secondary metabolite content, and found to contain the new natural product 4,5,6-trihydroxy-7-methylphthalide (1, epicoccone), together with 5-(acetoxymethyl)-furan-2-carboxylic acid (2), furan-2-carboxylic acid (3), 5-(hydroxymethyl)-furan-2-carboxylic acid (4), (-)-(3 R,4 S)-4-hydroxymellein (5), and (-)-(3 R)-5-hydroxymellein (6). The structures of all compounds were determined by interpretation of their spectroscopic data (1D and 2D NMR, MS, UV, optical rotation and IR). Each isolate was tested for its antioxidative properties. Compound 1 was found to be potently active, showing 95 % DPPH radical scavenging effects at 25 microg/mL. Compound 1 also inhibited the peroxidation of linolenic acid in the TBARS assay (62 % inhibition at 37 microg/mL). 相似文献
16.
Song FH Fan X Xu XL Zhao JL Han LJ Shi JG 《Journal of Asian natural products research》2005,7(6):777-781
A novel sesquiterpene-substituted benzoic acid, named dictyvaric acid (1), together with nine known compounds (2-10), have been isolated from the brown alga Dictyopteris divaricata Okam. The structure of 1 was elucidated as 3-[(decahydro-2-hydroxy-2,5,5,8a-tetramethyl-1-naphthalenyl)-methyl]-4-hydroxybenzoic acid by spectroscopic methods, including IR, FABMS, HR-FABMS, 1D and 2D NMR techniques. All compounds were obtained from this species for the first time. 相似文献
17.
Madureira AM Ferreira MJ Gyémánt N Ugocsai K Ascenso JR Abreu PM Hohmann J Molnár J 《Planta medica》2004,70(1):45-49
The rearranged jatrophane-type diterpenes ( 1 - 3), isolated from the Me (2)CO extracts of Euphorbia portlandica and Euphorbia segetalis, were examined for their effects on multidrug resistance (MDR) in mouse lymphoma cells. Compounds 2 and 3 revealed to be active with the latter being more active than the positive control verapamil, a known resistance modifier. The new compound 1, named portlandicine, was isolated from Euphorbia portlandica and its structure characterised by high-field NMR spectroscopic methods including 2D NMR techniques: COSY, HMQC, HMBC and NOESY. The known diterpene 2, together with aleuritolic acid ( 4), oleanolic acid ( 5), and betulin diacetate ( 6), were also isolated from the same species. 相似文献
18.
A new benzofuran lactone, rhuscholide A (1), was isolated from the stems of RHUS CHINENSIS, together with six known compounds: 5-hydroxy-7-(3,7,11,15-tetramethylhexadeca-2,6,10,11-tetraenyl)-2(3 H)-benzofuranone (2), betulin (3), betulonic acid (4), moronic acid (5), 3-oxo-6 beta-hydroxyolean-12-en-28-oic acid (6) and 3-oxo-6 beta-hydroxyolean-18-en-28-oic acid (7). Based on 1D, 2D NMR (COSY, HMQC, HMBC) and mass (EI-MS, HR-EI-MS) spectral data, the structure of rhuscholide A was deduced to be 5-hydroxy-3-(propan-2-ylidene)-7-(3,7,11,15-tetramethylhexadeca-2,6,10,11-tetraenyl)-2(3 H)-benzofuranone (1). Anti-HIV-1 bioassays IN VITRO revealed that compound 1 possesses significant anti-HIV-1 activity with an EC50 value of 1.62 microM and a therapeutic index (TI) of 42.40. Compounds 2, 4, 5 and 7 showed moderate anti-HIV-1 activities with EC50 values of 3.70, 5.81, 7.49 and 13.11 microM, respectively. 相似文献
19.
Shao M Wang Y Huang XJ Fan CL Zhang QW Zhang XQ Ye WC 《Journal of Asian natural products research》2012,14(4):348-354
Four new triterpenoids, psiguanins A-D (1-4), along with 13 known ones (5-17), were isolated from the leaves of Psidium guajava. The structures of new compounds were determined as 2α,3β-dihydroxy-taraxer-20-en-28-oic acid (1), 2α,3β,12α,13β-tetrahydroxy-urs-28-oic acid (2), 2α,3β,12β,13β-tetrahydroxy-urs-28-oic acid (3), and 2α,3β,12β,13α-tetrahydroxy-urs-28-oic acid (4), respectively, on the basis of comprehensive spectroscopic methods and molecular modeling calculation. Among them, compound 4 was characterized as an unusual ursane-type triterpenoid with cis-fused C/D ring system. 相似文献