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
A Novel Phenanthrenolide and C-Benzyl Dihydrochalcones from Uvaria Puguensis 普古乌耳草中一种新的菲蒽酚内酯和c -苄基二氢查尔酮
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/10575630290020604
J. Makangara, S. Jonker, M. Nkunya
{"title":"A Novel Phenanthrenolide and C-Benzyl Dihydrochalcones from Uvaria Puguensis","authors":"J. Makangara, S. Jonker, M. Nkunya","doi":"10.1080/10575630290020604","DOIUrl":"https://doi.org/10.1080/10575630290020604","url":null,"abstract":"Two new natural products, the phenanthrenoid puguenolide (6-hydroxy-3-methoxy-4-oxapyren-5-one) and isoangoletin were isolated from the stem bark of the newly described Uvaria species, U. puguensis D.M. Johnson, together with the sesquiterpene guaiol and the usual C-benzyldihydrochalcones previously found in the genus Uvaria , viz . uvaretin, diuvaretin, chamuvaritin and a mixture of triuvaretin and isotriuvaretin. Structural elucidation was achieved through a combination of spectroscopic methods.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75157649","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
Tri-Nordammarane Triterpenoids and Neoclerodane Diterpenoids From Salvia Aspera (Labiatae) 鼠尾草(唇形科)中的三-北达玛烷三萜和新氯罗德烷二萜
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/10575630290020046
B. Esquivel, Francisco Guerrero, R. Toscano
{"title":"Tri-Nordammarane Triterpenoids and Neoclerodane Diterpenoids From Salvia Aspera (Labiatae)","authors":"B. Esquivel, Francisco Guerrero, R. Toscano","doi":"10.1080/10575630290020046","DOIUrl":"https://doi.org/10.1080/10575630290020046","url":null,"abstract":"From the aerial parts of Salvia aspera one new tri-nordammarane named amblyol ( 1 ) was isolated besides amblyone ( 2 ). An X-ray analysis was performed on compound 1 . In addition, three known neoclerodane diterpenoids were also isolated. The structures of these compounds were established by spectral and chemical methods. The presence of dammarane triterpenoids in a Mexican Salvia is described for the first time.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75957637","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: 10
Triterpene Saponins from Craniotome Furcata
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/10575630290004233
C. Fan, Hai-Fang Sun, Shao-Nong Chen, J. Yue, Zhongwen Lin, Han-Dong Sun
{"title":"Triterpene Saponins from Craniotome Furcata","authors":"C. Fan, Hai-Fang Sun, Shao-Nong Chen, J. Yue, Zhongwen Lin, Han-Dong Sun","doi":"10.1080/10575630290004233","DOIUrl":"https://doi.org/10.1080/10575630290004233","url":null,"abstract":"Three saponins, craniosaponin A ( 1 ) and buddlejasaponins Ia ( 2 ) and I ( 3 ) were isolated from the n -butanol soluble fraction of Craniotome furcata for the first time. Among them, craniosaponin A ( 1 ) was identified to be a new compound. The structure of craniosaponin A was assigned mainly by spectral methods. A preliminary assay in vitro was applied to evaluate their cytotoxicity against several tumor cell-lines.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80052724","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: 14
Labdane Diterpenes from Haplopappus Illinitus
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/10575630290020460
F. Faini, C. Labbé, R. Torres, G. D. Monache, F. Monache
{"title":"Labdane Diterpenes from Haplopappus Illinitus","authors":"F. Faini, C. Labbé, R. Torres, G. D. Monache, F. Monache","doi":"10.1080/10575630290020460","DOIUrl":"https://doi.org/10.1080/10575630290020460","url":null,"abstract":"A chemical study of aerial parts of Haplopappus illinitus afforded five labdane diterpenoids whose structures were elucidated by high field NMR spectroscopy and 2D techniques. Four of them are dicarboxylic acids previously reported as the corresponding dimethyl ester derivatives and the fifth is a new compound.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83557060","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: 2
Isolation of Two New Ionone Glucosides from Quince ( Cydonia Oblonga Mill.) Leaves 昆柏(Cydonia Oblonga Mill)中两个新离子苷的分离叶子
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/10575630290020028
A. Lutz-Röder, Marc Schneider, P. Winterhalter
{"title":"Isolation of Two New Ionone Glucosides from Quince ( Cydonia Oblonga Mill.) Leaves","authors":"A. Lutz-Röder, Marc Schneider, P. Winterhalter","doi":"10.1080/10575630290020028","DOIUrl":"https://doi.org/10.1080/10575630290020028","url":null,"abstract":"The 9- O - - d -glucopyranosides of (6 R )-3-oxo-4-hydroxy-7,8-dihydro- -ionol 1 and 3-oxo-5,6-epoxy- -ionol 2 were isolated from quince leaves. The glycosidic extract was obtained by XAD-2 adsorption and MeOH elution. After DCCC separation and flash chromatography, purification by high performance liquid chromatography was carried out. The novel quince leaf constituents were characterized as peracetates 1a and 2a .","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91427615","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: 16
Clerodane Diterpenoids from Ajuga Bracteosa Wall 取自小苞草的克罗丹二萜类化合物
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/10575630290020578
V. H. Verma, U. Mahmood, Bikram Singh
{"title":"Clerodane Diterpenoids from Ajuga Bracteosa Wall","authors":"V. H. Verma, U. Mahmood, Bikram Singh","doi":"10.1080/10575630290020578","DOIUrl":"https://doi.org/10.1080/10575630290020578","url":null,"abstract":"The whole plant of Ajuga bracteosa afforded five compounds including one new clerodane diterpenoid designated as Bracteonin-A ( 1 ) 6 f -acetoxy, 15 (R&S)-methoxy, 18-(4'-hydroxy, 3'- g -methyl, 3'- f -acetoxy, butyryloxy) neoclerodane. The other compounds identified were 14,15-dihydroajugapitin, 14-hydro-15-hydroxy ajugapitin, g -sitosterol, and stigmasterol. The structural elucidation was carried out by spectroscopic techniques.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86048539","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: 13
Synthesis and Antioxidant Activity of 3-Substituted Guaiazulene Derivatives 3-取代愈创唑烯衍生物的合成及抗氧化活性研究
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/10575630290013585
H. Pratsinis, S. Haroutounian
{"title":"Synthesis and Antioxidant Activity of 3-Substituted Guaiazulene Derivatives","authors":"H. Pratsinis, S. Haroutounian","doi":"10.1080/10575630290013585","DOIUrl":"https://doi.org/10.1080/10575630290013585","url":null,"abstract":"A series of 3-substituted guaiazulene derivatives has been synthesized and their antioxidant properties were evaluated by monitoring their capacity for scavenging the stable free-radical DPPH. 3-Vinylguaiazulene was the most potent, possessing antioxidant activity superior than f -tocopherol. These derivatives were also moderate inhibitors of the proliferation of human promyelocytic leukemia cells.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91011561","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: 10
A New Steroidal Saponin from Tribulus Terrestris Linn 蒺藜中一种新的甾体皂苷
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/10575630290020541
Wen-ji Sun, Jin-Min Gao, G. Tu, Z. Guo, Yongming Zhang
{"title":"A New Steroidal Saponin from Tribulus Terrestris Linn","authors":"Wen-ji Sun, Jin-Min Gao, G. Tu, Z. Guo, Yongming Zhang","doi":"10.1080/10575630290020541","DOIUrl":"https://doi.org/10.1080/10575630290020541","url":null,"abstract":"A new steroidal saponin containing six monosaccharides was obtained from the total plant of Tribulus terrestris and elucidated based on chemical spectroscopic analysis, especially on 2D-NMR technology as 26- O - g - d -glucopyranosyl-22-methoxy-furostane-3- O -{ g - d -xylopyranosyl(1 M 3)-[ g - d -xylopyranosyl(1 M 2)- g - d -glucopyranosyl(1 M 4)]}-[ f - l -rhamnopyranosy(1 M 2)]- g - d -galactopyranoside.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73498838","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: 30
Isolation and Structure Elucidation of Three Glycosides and a Long Chain Alcohol from Polianthes Tuberosa Linn 牡丹中三个苷和一个长链醇的分离与结构解析
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/713604303
K. Khan, S. Perveen, S. A. M. Ayattollahi, N. Saba, A. Rashid, S. Firdous, Syed Moazzam Haider, Z. Ullah, Shagufta Rahat, Zarrar Khan
{"title":"Isolation and Structure Elucidation of Three Glycosides and a Long Chain Alcohol from Polianthes Tuberosa Linn","authors":"K. Khan, S. Perveen, S. A. M. Ayattollahi, N. Saba, A. Rashid, S. Firdous, Syed Moazzam Haider, Z. Ullah, Shagufta Rahat, Zarrar Khan","doi":"10.1080/713604303","DOIUrl":"https://doi.org/10.1080/713604303","url":null,"abstract":"Three glycosides and a long chain alcohol were isolated from the bulbs of Polianthes tuberosa , these were identified as 3,29-dihydroxystigmast-5-ene-3- O - g - d -galactopyranoside ( 1 ) 1 , ethyl g - d -galactopyranoside ( 2 ), ethyl- f - d -galactopyranoside ( 3 ), and 1-tricosanol ( 4 ). The structures were determined by extensive spectroscopic and chemical methods. All four isolated compounds were screened for their cytotoxicity, antibacterial and antifungal activities, none of the compounds showed any significant activity.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88950105","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
A Novel Flavonol Lyxoside of Orostachys Japonicus Herb 一种新的黄酮类醇苷类化合物
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/1057563029001/4818
S. Sung, W. J. Jung, Y. Kim
{"title":"A Novel Flavonol Lyxoside of Orostachys Japonicus Herb","authors":"S. Sung, W. J. Jung, Y. Kim","doi":"10.1080/1057563029001/4818","DOIUrl":"https://doi.org/10.1080/1057563029001/4818","url":null,"abstract":"A novel flavonol lyxoside was isolated from the aerial part of Orostachys japonicus (Crassulaceae). Its structure was determined as gossypetin 8-O-f-D-lyxopyranoside using several spectral data and chemical methods. Lyxoside of flavonoid was isolated for the first time from nature.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89420415","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: 16
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