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Diterpenoids from Salvia Ceratophylla
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/1057563029001/4845
A. Gören, G. Topçu, S. Öksüz, G. Kökdil, W. Voelter, A. Ulubelen
{"title":"Diterpenoids from Salvia Ceratophylla","authors":"A. Gören, G. Topçu, S. Öksüz, G. Kökdil, W. Voelter, A. Ulubelen","doi":"10.1080/1057563029001/4845","DOIUrl":"https://doi.org/10.1080/1057563029001/4845","url":null,"abstract":"Salvia ceratophylla L. has yielded four known and two new diterpenoids together with two triterpenic acids, a steroid and a flavone. The structures of the compounds were established by spectroscopic analyses. One of the known compounds candidissiol exhibited a high antibacterial activity against Staphylococcus epidermidis and Proteus mirabilis.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"38 1","pages":"47 - 52"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74567078","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: 21
Three New Hydroxylated Serratidine Alkaloids from Huperzia Serrata 从石杉中提取的三个新的羟化塞拉雷丁生物碱
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/10575630290004215
Changheng Tan, Xiao-Qiang Ma, Shan-hao Jiang, Da-yuan Zhu
{"title":"Three New Hydroxylated Serratidine Alkaloids from Huperzia Serrata","authors":"Changheng Tan, Xiao-Qiang Ma, Shan-hao Jiang, Da-yuan Zhu","doi":"10.1080/10575630290004215","DOIUrl":"https://doi.org/10.1080/10575630290004215","url":null,"abstract":"A known compound, serratidine ( 1 ), along with three hydroxylated serratidine alkaloids, 6 f -hydroxyserratidine ( 2 ), 4 f -hydroxyserratidine ( 3 ) and 4 f ,6 f -dihydroxyserratidine ( 4 ) were isolated from the CHCl 3 fraction of basic materials of whole plant of the Chinese medicinal herb Huperzia serrata . The relative configurations of the above compounds were determined based on 2D NMR studies.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"25 1","pages":"149 - 153"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74474386","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
Diterpenes from Sideritis Trojana 取自黄芪的二萜
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/1057563029001/4827
G. Topçu, A. Gören, T. Kilic, Y. Kemal YıLdız, G. Tümen
{"title":"Diterpenes from Sideritis Trojana","authors":"G. Topçu, A. Gören, T. Kilic, Y. Kemal YıLdız, G. Tümen","doi":"10.1080/1057563029001/4827","DOIUrl":"https://doi.org/10.1080/1057563029001/4827","url":null,"abstract":"Six known ent-kaurene, a new ent-kaurane and a new pimarane diterpenes were isolated from Sideritis trojana. The structures of new compounds were determined as ent-7f-15g,16g-epoxykaurane (1), and ent-2f-hydroxy-8(14),15-pimaradiene (2) along with the known compounds siderol (3), sideridiol (4), 7-epicandicandiol (5), isocandol B (6), candol A acetate (7) ent-7f-acetoxykaur-15-ene (8) by IR, 1D and 2D NMR techniques and HRMS.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"25 1","pages":"33 - 37"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87811457","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: 39
Ursethoxy Acid, a New Triterpene from Lantana Camara 熊乙氧基酸，一种新的三萜
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/10575630290020523
S. Begum, A. Wahab, B. Siddiqui
{"title":"Ursethoxy Acid, a New Triterpene from Lantana Camara","authors":"S. Begum, A. Wahab, B. Siddiqui","doi":"10.1080/10575630290020523","DOIUrl":"https://doi.org/10.1080/10575630290020523","url":null,"abstract":"A new pentacyclic triterpene, named ursethoxy acid ( 1 ) was isolated from the aerial parts of Lantana camara Linn. Its structure has been elucidated as 3,25-epoxy-3 f -ethoxy-urs-12-en-28-oic acid through extensive 1D- and 2D-NMR (COSY-45, NOESY, J -resolved, HMQC and HMBC) studies.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"39 1","pages":"235 - 238"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88885848","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: 9
Chemotaxonomic Features Associated with Flavonoids of Cannabinoid-Free Cannabis (Cannabis sativa subsp. sativa L.) in Relation to hops (Humulus Lupulus L.) 无大麻素大麻(Cannabis sativa subsp.)类黄酮的化学分类特征。sativa L.)与啤酒花(Humulus Lupulus L.)的关系
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/1057563029001/4863
G. Vanhoenacker, Philippe van Rompaey, D. de Keukeleire, P. Sandra
{"title":"Chemotaxonomic Features Associated with Flavonoids of Cannabinoid-Free Cannabis (Cannabis sativa subsp. sativa L.) in Relation to hops (Humulus Lupulus L.)","authors":"G. Vanhoenacker, Philippe van Rompaey, D. de Keukeleire, P. Sandra","doi":"10.1080/1057563029001/4863","DOIUrl":"https://doi.org/10.1080/1057563029001/4863","url":null,"abstract":"The major flavonoids present in the leaves and flowers of the cannabinoid-free cannabis (Cannabis sativa subsp. sativa L.) cultivars Felina and Futura are orientin (1), vitexin (2), luteolin-7-O-g-D-glucuronide (3), and apigenin-7-O-g-D-glucuronide (4), while prenylated flavonoids, to which the potent estrogenicity of hops (Humilus lupulus L.) is associated, are absent. The different composition of flavonoids has chemotaxonomic value.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"65 1","pages":"57 - 63"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82365217","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: 53
Relationships between Molecular Properties and Antimycobacterial Activities of Steroids 类固醇分子特性与抗真菌活性的关系
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/10575630290020000
J. Rugutt, K. J. Rugutt
{"title":"Relationships between Molecular Properties and Antimycobacterial Activities of Steroids","authors":"J. Rugutt, K. J. Rugutt","doi":"10.1080/10575630290020000","DOIUrl":"https://doi.org/10.1080/10575630290020000","url":null,"abstract":"Progesterone ( 1 ), cholesterol ( 2 ), stigmasterol ( 3 ), ergosterol endoperoxide ( 4 ), sitosterol ( 5 ), betulin ( 6 ), fusidic acid ( 7 ), chondrilasterol ( 8 ), and ergosterol ( 9 ) have been evaluated against Mycobacterium tuberculosis H37Rv. The maximum antimycobacterial activity seemed to depend on hydrophobicity and the type of substituents on the phytyl moiety on steroidal backbone. The variation in activity was rationalized using quantitative structure-activity relationship (QSAR) models based on several molecular descriptors including van der Waals surface area (VDW A ), van der Waals volume (VDW v ), polarizability, dipole moment, logP, and the differences between the Highest Occupied Molecular Orbital and the Lowest Unoccupied Molecular Orbital (HOMO-LUMO gap). The proposed QSAR models could be developed to predict the antimycobacterial activity of structurally similar steroids and to create a priority list for testing so that time, money, and effort can be focused on the potentially most promising steroids. The implications of QSAR data for the rational design of new antituberculosis agents are discussed. Because mycobacteria degrade steroids to progesterone-type compounds, unambiguous assignments of the high-field proton ( 1 H) and carbon-13 ( 13 C) NMR data of progesterone ( 1 ) were achieved through a combination of modern one- and two-dimensional (2D) NMR techniques.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"22 1","pages":"107 - 113"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75569574","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: 20
MAP™: Microwave-Assisted Extraction of Cockroaches MAP™:微波辅助提取蟑螂
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/10575630290020037
V. Yaylayan, J.R. Jocelyn Paré, G. Matni, J. Bélanger
{"title":"MAP™: Microwave-Assisted Extraction of Cockroaches","authors":"V. Yaylayan, J.R. Jocelyn Paré, G. Matni, J. Bélanger","doi":"10.1080/10575630290020037","DOIUrl":"https://doi.org/10.1080/10575630290020037","url":null,"abstract":"A Microwave-Assisted Process (MAP is a Trade-Mark of Her Majesty the Queen in Right of Canada as represented by the Minister of the Environment) solvent extraction procedure was used in conjunction with GC-MS analysis to investigate the chemical composition of dried and live cockroaches. The main components extracted were classified into four groups; sterols, fatty acids and their esters, long chain alkanes and fused aromatic hydrocarbons.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"98 1","pages":"123 - 127"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81125609","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
Antioxidant Capacity of Abietanes from Sphacele Salviae 丹参Abietanes抗氧化能力的研究
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/10575630290020631
B. Escuder, R. Torres, E. Lissi, C. Labbé, F. Faini
{"title":"Antioxidant Capacity of Abietanes from Sphacele Salviae","authors":"B. Escuder, R. Torres, E. Lissi, C. Labbé, F. Faini","doi":"10.1080/10575630290020631","DOIUrl":"https://doi.org/10.1080/10575630290020631","url":null,"abstract":"Carnosol 1 , rosmanol 2 , carnosic acid 3 and 20-deoxocarnosol 4 , the main phenolic abietanes present in aerial parts of the Chilean medicinal plant Sphacele salviae were tested for antioxidant activity of measuring the decay of the radical cation diphenyl-picrylhydrazyl (DPPH). All compounds displayed higher antioxidant levels than BHT under the same conditions and carnosic acid was more efficient than vitamin E.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"35 1","pages":"277 - 281"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89937705","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
3,4-Dihydroxy-7,8-Dihydro-β-Ionone 3- O -β- d -Glucopyranoside and Other Glycosidic Constituents from Apple Leaves 苹果叶片中的3,4-二羟基-7,8-二氢-β- ionone - 3- O -β- d - glucopyranoside及其他糖苷类成分
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/10575630290019976
C. Stingl, H. Knapp, P. Winterhalter
{"title":"3,4-Dihydroxy-7,8-Dihydro-β-Ionone 3- O -β- d -Glucopyranoside and Other Glycosidic Constituents from Apple Leaves","authors":"C. Stingl, H. Knapp, P. Winterhalter","doi":"10.1080/10575630290019976","DOIUrl":"https://doi.org/10.1080/10575630290019976","url":null,"abstract":"3,4-Dihydroxy-7,8-dihydro- -ionone 3- O - - d -glucopyranoside 1 has been isolated from a methanolic extract of apple ( Malus domestica ) leaves by XAD-2 adsorption chromatography and subsequent purification by high speed countercurrent chromatography (HSCCC) and HPLC. Under acidic conditions this glycoside gives rise to a number of volatile compounds including 1,1,6-trimethyl-1,2-dihydronaphthalene (TDN) 2 , which is known as an off-flavor compound in wine. In the course of the study, six additional glycoconjugates were isolated from apple leaves, i.e. roseoside 3 , 3-oxo- -ionol - d -glucopyranoside 4 , benzoic acid - d -glucose ester 5 , kaempferol 3- O -rhamnoside 6 , (+)-syringaresinol - d -glucopyranoside 7 and 4-hydroxy-5-(3\"-methyl-2\"-butenyl)-benzoic acid methylester 3- - d -glucopyranoside 8 . The latter compound has been isolated for the first time in nature. In order to avoid the 'kerosene-off-flavor' caused by TDN, the methanolic extract has been subjected to yeast fermentation. This treatment reduced the amount of TDN formed and resulted in an improved flavor impression of the methanolic extract.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"14 1","pages":"87 - 93"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78152957","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: 7
Synthesis, Dimerization, and Biological Activity of Hexaoxygenated Chalcones Related to Calythropsin and Combretastatins Calythropsin和Combretastatins相关六氧合查尔酮的合成、二聚化和生物活性
Natural Product Letters Pub Date : 2002-01-01 DOI: 10.1080/10575630290010993
E. Seguin, A. Elomri, P. Magiatis, A. Skaltsounis, L. Chao, F. Tillequin
{"title":"Synthesis, Dimerization, and Biological Activity of Hexaoxygenated Chalcones Related to Calythropsin and Combretastatins","authors":"E. Seguin, A. Elomri, P. Magiatis, A. Skaltsounis, L. Chao, F. Tillequin","doi":"10.1080/10575630290010993","DOIUrl":"https://doi.org/10.1080/10575630290010993","url":null,"abstract":"Five new hexaoxygenated chalcones and one new chalcone photodimer were synthesized and their cytotoxicity against leukemia cell line L-1210 was studied. The three more active compounds were tested for their activity on the inhibition and promotion of tubulin assembly and it was found that these chalcones do not interfere with the tubulin-microtubule system at cytotoxic concentrations, and therefore operate by some different mechanism of action.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"3 1","pages":"187 - 193"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87990060","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
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