Pub Date : 2001-12-01DOI: 10.1080/10575630108041314
M. Riaz, A. Malik, Sher Khan Sadhozai, Manzoor Hussain, N. Ullah
Abstract Daphwazirin, a new biscoumarin glycoside (1), along with four known compounds (2), (3), (4) and (5) has been isolated from the roots of Daphne oleoides. Its chemical structure is established as 7-hydroxy-8-[2-oxo-2H-1-benzopyran-7′-(O-α-L-rhamnosyl)-6′-yl]-2H-1-benzopyran-2-one through spectroscopic techniques and chemical analysis.
{"title":"Daphwazirin, Biscoumarin Glycopyranoside from Daphne oleoides","authors":"M. Riaz, A. Malik, Sher Khan Sadhozai, Manzoor Hussain, N. Ullah","doi":"10.1080/10575630108041314","DOIUrl":"https://doi.org/10.1080/10575630108041314","url":null,"abstract":"Abstract Daphwazirin, a new biscoumarin glycoside (1), along with four known compounds (2), (3), (4) and (5) has been isolated from the roots of Daphne oleoides. Its chemical structure is established as 7-hydroxy-8-[2-oxo-2H-1-benzopyran-7′-(O-α-L-rhamnosyl)-6′-yl]-2H-1-benzopyran-2-one through spectroscopic techniques and chemical analysis.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83183425","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}
Pub Date : 2001-12-01DOI: 10.1080/10575630108041311
P. Polychronopoulos, P. Magiatis, A. Skaltsounis, F. Tillequin, E. Vardala-theodorou, A. Tsarbopoulos
Abstract Homarine was isolated from nine edible species of marine molluscs belonging to classes Gastropoda, Bivalvia, and Cephalopoda. A thorough chromatographic, NMR and MS study provided evidence that homarine is a common and abundant metabolite of all these species. This study casts doubt on a previous assertion that 1,1′-dimethyl-[2,2′]-bipyridinium is a metabolite of the Bivalve Callista chione.
{"title":"Homarine, a Common Metabolite in Edible Mediterranean Molluscs: Occurrence, Spectral Data and Revision of a Related Structure","authors":"P. Polychronopoulos, P. Magiatis, A. Skaltsounis, F. Tillequin, E. Vardala-theodorou, A. Tsarbopoulos","doi":"10.1080/10575630108041311","DOIUrl":"https://doi.org/10.1080/10575630108041311","url":null,"abstract":"Abstract Homarine was isolated from nine edible species of marine molluscs belonging to classes Gastropoda, Bivalvia, and Cephalopoda. A thorough chromatographic, NMR and MS study provided evidence that homarine is a common and abundant metabolite of all these species. This study casts doubt on a previous assertion that 1,1′-dimethyl-[2,2′]-bipyridinium is a metabolite of the Bivalve Callista chione.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78070954","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}
Pub Date : 2001-11-01DOI: 10.1080/10575630108041301
H. Herath, P. Athukoralage, J. Jamie
Abstract The chemical investigation of the hexane extract of the stem bark of Gordonia ceylanica afforded 3β-acetoxy-11α(2′.3′-epoxyferulyloxy)-olean-13(18)-ene as a new natural product and α-spinasterol for the first time from Gordonia.
{"title":"A New Oleanane Triterpenoid from Gordonia ceylanica","authors":"H. Herath, P. Athukoralage, J. Jamie","doi":"10.1080/10575630108041301","DOIUrl":"https://doi.org/10.1080/10575630108041301","url":null,"abstract":"Abstract The chemical investigation of the hexane extract of the stem bark of Gordonia ceylanica afforded 3β-acetoxy-11α(2′.3′-epoxyferulyloxy)-olean-13(18)-ene as a new natural product and α-spinasterol for the first time from Gordonia.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75812003","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}
Pub Date : 2001-11-01DOI: 10.1080/10575630108041297
A. Ulubelen, S. Öksüz, G. Topçu, A. Gören, C. Bozok-johansson, C. Çelik, G. Kökdil, W. Voelter
Abstract From the roots of Saliva caespitosa Montbret and Aucher ex. Bentham a new diterpene 6β-hydroxyisopimaric acid (1) has been isolated together with four known diterpenes, one new triterpenoid, 3-acetylvergatic acid (2), as well as five known triterpenoids, two steroids and a flavone. The structures of the compounds were established by spectroscopic analyses. The isolated compounds were tested against standard bacterial strains. Only the new diterpene, 6β-hydroxyisopimaric acid has strong activity (MIC 9μg/ml) against S. aureus and (MIC 18μg/ml) against S. epidermidis as well as against B. subtilis (MIC 9μg/ml).
{"title":"A New Antibacterial Diterpene from the Roots of Salvia caespitosa","authors":"A. Ulubelen, S. Öksüz, G. Topçu, A. Gören, C. Bozok-johansson, C. Çelik, G. Kökdil, W. Voelter","doi":"10.1080/10575630108041297","DOIUrl":"https://doi.org/10.1080/10575630108041297","url":null,"abstract":"Abstract From the roots of Saliva caespitosa Montbret and Aucher ex. Bentham a new diterpene 6β-hydroxyisopimaric acid (1) has been isolated together with four known diterpenes, one new triterpenoid, 3-acetylvergatic acid (2), as well as five known triterpenoids, two steroids and a flavone. The structures of the compounds were established by spectroscopic analyses. The isolated compounds were tested against standard bacterial strains. Only the new diterpene, 6β-hydroxyisopimaric acid has strong activity (MIC 9μg/ml) against S. aureus and (MIC 18μg/ml) against S. epidermidis as well as against B. subtilis (MIC 9μg/ml).","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88656975","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}
Pub Date : 2001-11-01DOI: 10.1080/10575630108041299
Sâmia Andrícia Souza da Silva, J. C. Castro, T. G. Silva, Emidio V. Leitão da‐Cunha, J. Barbosa-Filho, M. S. Silva
Abstract A new phenylcoumarone type trinorlignan, krametosan (1), along with the known norlignans. ratanhiaphenol I (2) and 2-(2′-hydroxy-4′,6′-dimethoxyphenyl)-5-(E)-propenylbenzofuran (3). the lignan conocarpan (4) and dinorlignan decurrenal (5), were isolated from the CHCl3 extract of the roots of Krameria tomentosa. The structure of these compounds were elucidated by the spectroscopic methods.
{"title":"Kramentosan, a New Trinorlignan from the Roots of Krameria tomentosa","authors":"Sâmia Andrícia Souza da Silva, J. C. Castro, T. G. Silva, Emidio V. Leitão da‐Cunha, J. Barbosa-Filho, M. S. Silva","doi":"10.1080/10575630108041299","DOIUrl":"https://doi.org/10.1080/10575630108041299","url":null,"abstract":"Abstract A new phenylcoumarone type trinorlignan, krametosan (1), along with the known norlignans. ratanhiaphenol I (2) and 2-(2′-hydroxy-4′,6′-dimethoxyphenyl)-5-(E)-propenylbenzofuran (3). the lignan conocarpan (4) and dinorlignan decurrenal (5), were isolated from the CHCl3 extract of the roots of Krameria tomentosa. The structure of these compounds were elucidated by the spectroscopic methods.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85394567","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}
Pub Date : 2001-11-01DOI: 10.1080/10575630108041300
N. Cuong, W. C. Taylor, T. Sung
Abstract A new cyclobutane lignan, named cinbalansan (6), was isolated from the leaves of Cinnamomum balansae, along with five known compounds, 1,2-dimethoxy-4-(1-E-propenyl)benzene (1), 1,2-dimethoxy-4-(1-Z-propenyl)benzene (2), 1,2-dimethoxy-4-(2-propenyl)benzene (3), 3,4-dimethoxybenzaldehyde (4), and E-(3,4-dimethoxyphenyl)-2-propenal (5). The structure of cinbalansan was shown to be 1β,2β,3α,4α-1,2-dimethyi-3,4-bis(3,4-dimethoxyphenyl)cyclobutane by a combination of 1H-, 13C-NMR, and NOE- experiments and by direct analysis of the 1H-NMR spectrum by the method of X-application.
{"title":"A New Cyclobutane Lignan from Cinnamomum balansae","authors":"N. Cuong, W. C. Taylor, T. Sung","doi":"10.1080/10575630108041300","DOIUrl":"https://doi.org/10.1080/10575630108041300","url":null,"abstract":"Abstract A new cyclobutane lignan, named cinbalansan (6), was isolated from the leaves of Cinnamomum balansae, along with five known compounds, 1,2-dimethoxy-4-(1-E-propenyl)benzene (1), 1,2-dimethoxy-4-(1-Z-propenyl)benzene (2), 1,2-dimethoxy-4-(2-propenyl)benzene (3), 3,4-dimethoxybenzaldehyde (4), and E-(3,4-dimethoxyphenyl)-2-propenal (5). The structure of cinbalansan was shown to be 1β,2β,3α,4α-1,2-dimethyi-3,4-bis(3,4-dimethoxyphenyl)cyclobutane by a combination of 1H-, 13C-NMR, and NOE- experiments and by direct analysis of the 1H-NMR spectrum by the method of X-application.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74463754","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}
Pub Date : 2001-11-01DOI: 10.1080/10575630108041302
T. Ersöz, W. Schühly, S. Popov, N. Handjieva, O. Sticher, İ. Çalış
Abstract From the aerial parts of Phlomis longifolia var. longifolia four iridoid glucosides, shanzhiside methyl ester (1), 5-deoxypulchelloside I (2), lamalbide (3), phlomiol (4) and three phenylethanoid glycosides, verbascoside (5), forsythoside B (6). leucosceptoside A (7) along with the caffeic acid ester, chlorogenic acid (8) were isolated. The structures of the isolated compounds were established by spectroscopic (UV, IR, ID- and 2D-NMR, FABMS) and chemical evidence. The structure elucidation of the iridoid compounds 2 and 3 are discussed in detail.
{"title":"Iridoid and Phenylethanoid Glycosides from Phlomis longifolia var. longifolia","authors":"T. Ersöz, W. Schühly, S. Popov, N. Handjieva, O. Sticher, İ. Çalış","doi":"10.1080/10575630108041302","DOIUrl":"https://doi.org/10.1080/10575630108041302","url":null,"abstract":"Abstract From the aerial parts of Phlomis longifolia var. longifolia four iridoid glucosides, shanzhiside methyl ester (1), 5-deoxypulchelloside I (2), lamalbide (3), phlomiol (4) and three phenylethanoid glycosides, verbascoside (5), forsythoside B (6). leucosceptoside A (7) along with the caffeic acid ester, chlorogenic acid (8) were isolated. The structures of the isolated compounds were established by spectroscopic (UV, IR, ID- and 2D-NMR, FABMS) and chemical evidence. The structure elucidation of the iridoid compounds 2 and 3 are discussed in detail.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77532768","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}
Pub Date : 2001-11-01DOI: 10.1080/10575630108041294
Abstract This is a scanned image of the original Editorial Board page(s) for this issue.
这是本刊编辑委员会原始页面的扫描图像。
{"title":"Editorial board page for “Natural Product Letters”, Volume 15, Number 5","authors":"","doi":"10.1080/10575630108041294","DOIUrl":"https://doi.org/10.1080/10575630108041294","url":null,"abstract":"Abstract This is a scanned image of the original Editorial Board page(s) for this issue.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73430745","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}
Pub Date : 2001-11-01DOI: 10.1080/10575630108041304
Francis Group, Cycloartane Triterpenes, Jose R. ASCENSOb, Maria-José U. Ferreira
Abstract Investigation of the acetone extract of the whole plant of Euphorbia tuckeyana afforded a new cycloartane-type triterpene named as cyclotucanol. Its structure was established as cycloartane-24-methylene-3β,25-diol (1). The known cycloartane triterpenes cycloeucalenol (2), 3β-hydroxycycloart-25-en-24-one (3), cycloart-25-ene-3β,24-diol (4), 25,26,27-trisnor-3β-hydroxycycloartan-24-al (5) and cycloart-23-ene-3β,25-diol (6) were also isolated and identified.
{"title":"Cycloartane Triterpenes from Euphorbia tuckeyana","authors":"Francis Group, Cycloartane Triterpenes, Jose R. ASCENSOb, Maria-José U. Ferreira","doi":"10.1080/10575630108041304","DOIUrl":"https://doi.org/10.1080/10575630108041304","url":null,"abstract":"Abstract Investigation of the acetone extract of the whole plant of Euphorbia tuckeyana afforded a new cycloartane-type triterpene named as cyclotucanol. Its structure was established as cycloartane-24-methylene-3β,25-diol (1). The known cycloartane triterpenes cycloeucalenol (2), 3β-hydroxycycloart-25-en-24-one (3), cycloart-25-ene-3β,24-diol (4), 25,26,27-trisnor-3β-hydroxycycloartan-24-al (5) and cycloart-23-ene-3β,25-diol (6) were also isolated and identified.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72720581","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}
Pub Date : 2001-11-01DOI: 10.1080/10575630108041298
R. Yadava
Abstract A new biologically active triterpenoid saponin m.f. C42H68O13, m.p. 315[ddot]-317°C was isolated from the ethyl acetate soluble fraction of the methanolic extract of the leaves of Lepidagathis hyalina. Its structure was characterized as 3-β-O-[α-L-rhamnopyranosyl(1→4)O-β-D-glucopyranosyl]16-α-hydroxy-olean-12-en(13)-28-oic acid by several spectral and chemical analysis. This new triterpenoid saponin showed antimicrobial activity against various plants pathogenic bacteria and fungi.
摘要从透明鳞草(Lepidagathis hyalina)叶甲醇提取物的乙酸乙酯可溶性组分中分离得到一种新的生物活性三萜皂苷m.f. C42H68O13, m.p. 315[ddot]-317°C。经多种光谱和化学分析，其结构为3-β-O-[α- l -鼠李糖吡喃基(1→4)O-β- d -葡萄糖吡喃基]16-α-羟基齐墩-12-烯(13)-28-酸。该新型三萜皂苷对多种植物病原菌和真菌均有抑菌活性。
{"title":"A New Biologically Active Triterpenoid Saponin from the Leaves of Lepidagathis hyalina nees","authors":"R. Yadava","doi":"10.1080/10575630108041298","DOIUrl":"https://doi.org/10.1080/10575630108041298","url":null,"abstract":"Abstract A new biologically active triterpenoid saponin m.f. C42H68O13, m.p. 315[ddot]-317°C was isolated from the ethyl acetate soluble fraction of the methanolic extract of the leaves of Lepidagathis hyalina. Its structure was characterized as 3-β-O-[α-L-rhamnopyranosyl(1→4)O-β-D-glucopyranosyl]16-α-hydroxy-olean-12-en(13)-28-oic acid by several spectral and chemical analysis. This new triterpenoid saponin showed antimicrobial activity against various plants pathogenic bacteria and fungi.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79754108","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}
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