发布求助
文献互助 智能选刊 最新文献

Natural Product Letters最新文献

筛选
英文 中文
Cis-bullatencin, a linear acetogenin from roots of Uvaria chamae. 顺式膨胀素，一种从乌耳草根中提取的线状膨胀素。
Natural Product Letters Pub Date : 2002-10-01 DOI: 10.1080/10575630290026437
Djibril Fall, Christophe Gleye, Xavier Franck, Alain Laurens, Reynald Hocquemiller
{"title":"Cis-bullatencin, a linear acetogenin from roots of Uvaria chamae.","authors":"Djibril Fall,&nbsp;Christophe Gleye,&nbsp;Xavier Franck,&nbsp;Alain Laurens,&nbsp;Reynald Hocquemiller","doi":"10.1080/10575630290026437","DOIUrl":"https://doi.org/10.1080/10575630290026437","url":null,"abstract":"<p><p>A novel acetogenin, cis-bullatencin, was isolated by successive chromatography of a cyclohexane extract of Uvaria chamae P. Beauv. roots. The structure was elucidated by a combination of chemical and spectroscopic methods (NMR, MS). Eight known mono-THF acetogenins--bullatencin, annotemoyin-1, solamin, uvariamicin-I, -II, -III, cis-reticulatacin and cis-uvariamicin-I--were also obtained.</p>","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"16 5","pages":"315-21"},"PeriodicalIF":0.0,"publicationDate":"2002-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10575630290026437","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22114159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Effect of some ultraviolet light absorbers on photo-stabilization of azadirachtin-A. 几种紫外光吸收剂对印楝素a光稳定性的影响。
Natural Product Letters Pub Date : 2002-10-01 DOI: 10.1080/10575630290031981
P T Deota, P R Upadhyay, K B Patel, K J Mehta, A K Varshney, M H Mehta
{"title":"Effect of some ultraviolet light absorbers on photo-stabilization of azadirachtin-A.","authors":"P T Deota,&nbsp;P R Upadhyay,&nbsp;K B Patel,&nbsp;K J Mehta,&nbsp;A K Varshney,&nbsp;M H Mehta","doi":"10.1080/10575630290031981","DOIUrl":"https://doi.org/10.1080/10575630290031981","url":null,"abstract":"<p><p>The effect of photo-stabilization of Azadirachtin-A (Aza-A) was examined when exposed to sunlight and ultraviolet light in the presence of four structurally different ultraviolet stabilizers namely 4-aminobenzoic acid, 2,4-dihydroxybenzophenone, 4,4'-dihydroxybenzophenone and phenyl salicylate. The percentages of Aza-A recovered at different time intervals from slides exposed to different light conditions with and without UV stabilizers as well as kinetic studies indicated that the addition of phenyl salicylate in methanolic solution of Aza-A (in 1:1 mole ratio) provides the best photo-stabilization of Aza-A molecule among the four UV stabilizers studied.</p>","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"16 5","pages":"329-34"},"PeriodicalIF":0.0,"publicationDate":"2002-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10575630290031981","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22114161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Structure and biological activity of a new rotenoid from Pongamia pinnata. 一种新类鱼鱼蛋白的结构和生物活性研究。
Natural Product Letters Pub Date : 2002-10-01 DOI: 10.1080/10575630290033114
K Simin, Zulfiqar Ali, Syed Muhammad Khaliq-Uz-Zaman, Viqar Uddin Ahmad
{"title":"Structure and biological activity of a new rotenoid from Pongamia pinnata.","authors":"K Simin,&nbsp;Zulfiqar Ali,&nbsp;Syed Muhammad Khaliq-Uz-Zaman,&nbsp;Viqar Uddin Ahmad","doi":"10.1080/10575630290033114","DOIUrl":"https://doi.org/10.1080/10575630290033114","url":null,"abstract":"<p><p>Pongarotene (1), a new rotenoid and karanjin (2), a known flavonol, were isolated from the seeds of Pongamia pinnata. The structure determination of these compounds were based on spectral analyses including 2D-NMR. The antifungal, antibacterial and phytotoxicity results of pure compounds 1 and 2 as well as of the methanol (M) and ethyl acetate (E) crude extracts are also being reported.</p>","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"16 5","pages":"351-7"},"PeriodicalIF":0.0,"publicationDate":"2002-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10575630290033114","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22115308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 62
Methyl gardenolate A, a novel cycloartenoid ester from the leaves of Combretum woodii (Combretaceae). 栀子酸甲酯:一种从紫花蒿叶中提取的新型环类蜘蛛酸酯。
Natural Product Letters Pub Date : 2002-10-01 DOI: 10.1080/10575630290020587
Philip H Coombes, Colin B Rogers
{"title":"Methyl gardenolate A, a novel cycloartenoid ester from the leaves of Combretum woodii (Combretaceae).","authors":"Philip H Coombes,&nbsp;Colin B Rogers","doi":"10.1080/10575630290020587","DOIUrl":"https://doi.org/10.1080/10575630290020587","url":null,"abstract":"<p><p>Isolation of the novel cycloartenoid ester methyl gardenolate A (3a), together with gardenolic acid A (2a) and the unusual triterpenoid xi-glutinol (D:B-friedoolean-5-en-3xi-ol) (1a) from the leaves of Combretum woodii support its differentiation from the closely related C. krausii.</p>","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"16 5","pages":"301-4"},"PeriodicalIF":0.0,"publicationDate":"2002-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10575630290020587","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22114157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Antifeedant activity of metabolites from Viguiera tucumanensis. 黄颡鱼代谢物的拒食活性。
Natural Product Letters Pub Date : 2002-10-01 DOI: 10.1080/10575630290030711
Clarisa E Vaccarini, Sara M Palacios, Karina M Meragelman, Virginia E Sosa
{"title":"Antifeedant activity of metabolites from Viguiera tucumanensis.","authors":"Clarisa E Vaccarini,&nbsp;Sara M Palacios,&nbsp;Karina M Meragelman,&nbsp;Virginia E Sosa","doi":"10.1080/10575630290030711","DOIUrl":"https://doi.org/10.1080/10575630290030711","url":null,"abstract":"<p><p>Several terpenoids and clerod-14-ene-3alpha, 4beta,13xi-triol (1), the main compound of V. tucumanensis, were isolated and bioassayed. The clerodane 1 showed higher antifeedant activity than other related compounds. Structure-activity relationships are also discussed.</p>","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"16 5","pages":"323-7"},"PeriodicalIF":0.0,"publicationDate":"2002-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10575630290030711","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22114160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Antimicrobial triterpenes from Debregeasia salicifolia. 柳叶Debregasia salicifolia中的抗菌三萜类化合物。
Natural Product Letters Pub Date : 2002-10-01 DOI: 10.1080/10575630290033088
Erum Akbar, Abdul Malik
{"title":"Antimicrobial triterpenes from Debregeasia salicifolia.","authors":"Erum Akbar,&nbsp;Abdul Malik","doi":"10.1080/10575630290033088","DOIUrl":"https://doi.org/10.1080/10575630290033088","url":null,"abstract":"<p><p>New triterpene, 3beta-(trans-cinnamoyloxy)-19alpha-hydroxy-urs-12-ene (1) has been isolated from the methanolic fraction of Debregeasia salicifolia, along with uvaol (2), 3beta,19alpha-dihydroxy-urs-12-ene (3), ursolic acid (4), pomolic acid (5), pomolic acid methyl ester (6) and tormentic acid (7) reported for the first time from this species. The compounds (1), (3) and (6) showed significant antimicrobial activity. The structure elucidation was made with the help of extensive 2D NMR spectroscopic techniques.</p>","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"16 5","pages":"339-44"},"PeriodicalIF":0.0,"publicationDate":"2002-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10575630290033088","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22115306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 29
Triterpene and coumarins from Skimmia laureola. 月桂木中的三萜和香豆素。
Natural Product Letters Pub Date : 2002-10-01 DOI: 10.1080/10575630290020613
Atta-Ur-Rahman, Nighat Sultana, M Riaz Khan, M Iqbal Choudhary
{"title":"Triterpene and coumarins from Skimmia laureola.","authors":"Atta-Ur-Rahman,&nbsp;Nighat Sultana,&nbsp;M Riaz Khan,&nbsp;M Iqbal Choudhary","doi":"10.1080/10575630290020613","DOIUrl":"https://doi.org/10.1080/10575630290020613","url":null,"abstract":"<p><p>In the course of our studies on the chemical constituents of the leaves of Skimmia laureola, a new triterpene O-methyl cyclolaudenol (1) and a new coumarin, (+)-7-methoxy-6-(2'R-methoxy-3'-hydroxy-3'-methyl butyl) coumarin (2) were isolated. In addition five known coumarins, isogospherol (3), heraclenol (4), 5,8-dimethoxy coumarin-2H-1-benzopyran-2-one (5), 7-methoxy-6[2'-oxo-3'-methyl butyl] coumarin (6), and (+)-ulopterol (7) were also isolated for the first time from this plant. The structures were identified by spectroscopic studies and the stereochemistry at C-2' in compounds 3 and 4 were established by Horeau's procedure.</p>","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"16 5","pages":"305-13"},"PeriodicalIF":0.0,"publicationDate":"2002-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10575630290020613","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22114158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
Microbial transformation of (+)-adrenosterone. (+)-肾上腺素酮的微生物转化。
Natural Product Letters Pub Date : 2002-10-01 DOI: 10.1080/10575630290033105
S Ghulam Musharraf, Atta-Ur-Rahman, M Iqbal Choudhary, Sadia Sultan
{"title":"Microbial transformation of (+)-adrenosterone.","authors":"S Ghulam Musharraf,&nbsp;Atta-Ur-Rahman,&nbsp;M Iqbal Choudhary,&nbsp;Sadia Sultan","doi":"10.1080/10575630290033105","DOIUrl":"https://doi.org/10.1080/10575630290033105","url":null,"abstract":"<p><p>The microbial transformation of (+)-adrenosterone (1) by Cephalosporium aphidicola afforded three metabolites identified as androsta-1,4-diene-3,11,17-trione (2), 17beta-hydroxyandrost-4-ene-3,11-dione (3) and 17beta-hydroxyandrosta-1,4-diene-3,11-dione (4). The fermentation of 1 with Fusarium lini also produced metabolites 2 and 4, while the fermentation with Trichothecium roseum afforded metabolite 3. The structures of transformed products were determined by spectroscopic methods.</p>","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"16 5","pages":"345-9"},"PeriodicalIF":0.0,"publicationDate":"2002-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10575630290033105","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22115307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 25
The Willgerodt-Kindler reaction on lupenone: unusual oxidative dimerization. lupenone的Willgerodt-Kindler反应:不寻常的氧化二聚化。
Natural Product Letters Pub Date : 2002-10-01 DOI: 10.1080/10575630290020514
Farooq Biabani, Sanjay K Singh, S Kumar, Kanwal Raj, A Pathak
{"title":"The Willgerodt-Kindler reaction on lupenone: unusual oxidative dimerization.","authors":"Farooq Biabani,&nbsp;Sanjay K Singh,&nbsp;S Kumar,&nbsp;Kanwal Raj,&nbsp;A Pathak","doi":"10.1080/10575630290020514","DOIUrl":"https://doi.org/10.1080/10575630290020514","url":null,"abstract":"<p><p>In continuation of our interest in chemical modification of triterpenoids, the Willgerodt-Kindler reaction of a lupane type triterpenoid lupenone provided a novel dimerized product 2. Formation of 2 is associated with an unusual oxidative dimerization of lupenone under Willgerodt-Kindler reaction conditions. The structure 2 was confirmed by extensive analysis of spectroscopic data including ES-MS and 2D-NMR.</p>","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"16 5","pages":"297-300"},"PeriodicalIF":0.0,"publicationDate":"2002-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10575630290020514","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22114156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Pinoresinol from Ipomoea cairica cell cultures. 石竹细胞培养的松脂醇。
Natural Product Letters Pub Date : 2002-10-01 DOI: 10.1080/1057530290033123
Csilla Páska, Gabbriella Innocenti, Mariagrazia Ferlin, Mónika Kunvári, Miklós László
{"title":"Pinoresinol from Ipomoea cairica cell cultures.","authors":"Csilla Páska,&nbsp;Gabbriella Innocenti,&nbsp;Mariagrazia Ferlin,&nbsp;Mónika Kunvári,&nbsp;Miklós László","doi":"10.1080/1057530290033123","DOIUrl":"https://doi.org/10.1080/1057530290033123","url":null,"abstract":"<p><p>Ipomoea cairica cell cultures produced a tetrahydrofuran lignan, (+)-pinoresinol, identified by UV, IR, MS and NMR methods, not yet found in the intact plant, and new in the Convolvulaceae family. Pinoresinol was found to have antioxidant and Ca2+ antagonist properties. As it could be requested for its biological activity, we examined the possibility to raise the pinoresinol yield of I. cairica cultures, as well as we continued investigations on lignans' response to optimization.</p>","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"16 5","pages":"359-63"},"PeriodicalIF":0.0,"publicationDate":"2002-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/1057530290033123","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22115309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 27
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信