Pub Date : 2002-01-01DOI: 10.1080/10575630290020479
M. Belem-Pinheiro, P. Couceiro, A. I. D. Da Rocha, F. Monte, J. Villar
A new strychnobrasiline derivative, 12-hydroxy-10,11-dimethoxystrychnobrasiline 1 , has been isolated from the stem barks of Strychnos mattogrossensis . Its structure was established by spectroscopy analysis (1D and 2D NMR, MS, IR, UV) and literature data comparison. Two other known indoline alkaloids were also obtained from the heartwood, 12-hydroxy-11-methoxystrychnobrasiline 2 and strychnobrasiline 3 .
{"title":"A New Strychnobrasiline Base of Strychnos Mattogrossensis","authors":"M. Belem-Pinheiro, P. Couceiro, A. I. D. Da Rocha, F. Monte, J. Villar","doi":"10.1080/10575630290020479","DOIUrl":"https://doi.org/10.1080/10575630290020479","url":null,"abstract":"A new strychnobrasiline derivative, 12-hydroxy-10,11-dimethoxystrychnobrasiline 1 , has been isolated from the stem barks of Strychnos mattogrossensis . Its structure was established by spectroscopy analysis (1D and 2D NMR, MS, IR, UV) and literature data comparison. Two other known indoline alkaloids were also obtained from the heartwood, 12-hydroxy-11-methoxystrychnobrasiline 2 and strychnobrasiline 3 .","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"34 1","pages":"229 - 233"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84020255","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 : 2002-01-01DOI: 10.1080/10575630290020055
M. Ouyang, Xu Zhang, Dianpeng Li
A novel 18,19-seco-ursane saponin, aculeoside I ( 1 ), in addition to four known saponins were isolated from the leaves of Ilex aculeolata Nakai and identified by using spectroscopic and chemical methods. The structure of the new saponin was established as 3,19-dihydroxyl-16,21-epoxy-18,19-seco-13(18)-urs-ene-28-oic-acid-19-O- - l -rhamnopyranosyl-(1 2)- - l -arabinopyranoside.
{"title":"Aculeoside I, A Novel 18,19-Seco-ursane Saponin Isolated from Ilex Aculeolata","authors":"M. Ouyang, Xu Zhang, Dianpeng Li","doi":"10.1080/10575630290020055","DOIUrl":"https://doi.org/10.1080/10575630290020055","url":null,"abstract":"A novel 18,19-seco-ursane saponin, aculeoside I ( 1 ), in addition to four known saponins were isolated from the leaves of Ilex aculeolata Nakai and identified by using spectroscopic and chemical methods. The structure of the new saponin was established as 3,19-dihydroxyl-16,21-epoxy-18,19-seco-13(18)-urs-ene-28-oic-acid-19-O- - l -rhamnopyranosyl-(1 2)- - l -arabinopyranoside.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"1 1","pages":"137 - 141"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79930490","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 : 2002-01-01DOI: 10.1080/10575630290019985
Lucia Puricelli, G. Innocenti, G. D. Monache, R. Caniato, R. Filippini, E. Cappelletti
A protocol for shoot induction from callus of Haplophyllum patavinum was established. Two known furoquinoline (skimmianine and haplopine), and three quinolone (edulinine, ribalinine and isoplatydesmine) alkaloids were isolated for the first time from plant material, callus and shoot cultures of this species. The structures of these compounds have been characterised on the basis of spectroscopic evidence.
{"title":"In Vivo and In Vitro Production of Alkaloids by Haplophyllum Patavinum","authors":"Lucia Puricelli, G. Innocenti, G. D. Monache, R. Caniato, R. Filippini, E. Cappelletti","doi":"10.1080/10575630290019985","DOIUrl":"https://doi.org/10.1080/10575630290019985","url":null,"abstract":"A protocol for shoot induction from callus of Haplophyllum patavinum was established. Two known furoquinoline (skimmianine and haplopine), and three quinolone (edulinine, ribalinine and isoplatydesmine) alkaloids were isolated for the first time from plant material, callus and shoot cultures of this species. The structures of these compounds have been characterised on the basis of spectroscopic evidence.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"57 1","pages":"100 - 95"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82012857","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 : 2002-01-01DOI: 10.1080/1057563029001/4782
R. Flores, L. Pous, M. Sanz, C. Ardanaz, E. Guerreiro
Aspergillus niger cultures monohydroxylate ilicic alcohol in C-3 in a cis position with respect to the methyl groups at C-4 and C-10, and trans position with respect to the hydroxyl group of C-4. Furthermore, Aspergillus niger cultures reduce ilicic aldehyde to its corresponding alcohol.
{"title":"Bioconversion of Ilicic Alcohol and Derivatives with Cultures of Filamentous Fungi","authors":"R. Flores, L. Pous, M. Sanz, C. Ardanaz, E. Guerreiro","doi":"10.1080/1057563029001/4782","DOIUrl":"https://doi.org/10.1080/1057563029001/4782","url":null,"abstract":"Aspergillus niger cultures monohydroxylate ilicic alcohol in C-3 in a cis position with respect to the methyl groups at C-4 and C-10, and trans position with respect to the hydroxyl group of C-4. Furthermore, Aspergillus niger cultures reduce ilicic aldehyde to its corresponding alcohol.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"44 1","pages":"14 - 9"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86055488","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 : 2002-01-01DOI: 10.1080/10575630290020451
M. Ali, M. Jahangir
The ethyl acetate soluble part of hexane extract of Tridax procumbens yielded a new bis-bithiophene named tridbisbithiophene along with four known terpenoids: taraxasteryl acetate, g -amyrenone, lupeol and oleanolic acid, which have never been reported so far from Tridax procumbens . The structures of all the isolated constituents were elucidated with the aid of 1 D-NMR spectroscopy whereas, the structure of new constituent tridbisbithiophene was confirmed via COSY and HMBC interactions.
{"title":"A Bis-Bithiophene from Tridax Procumbens L. (Asteraceae)","authors":"M. Ali, M. Jahangir","doi":"10.1080/10575630290020451","DOIUrl":"https://doi.org/10.1080/10575630290020451","url":null,"abstract":"The ethyl acetate soluble part of hexane extract of Tridax procumbens yielded a new bis-bithiophene named tridbisbithiophene along with four known terpenoids: taraxasteryl acetate, g -amyrenone, lupeol and oleanolic acid, which have never been reported so far from Tridax procumbens . The structures of all the isolated constituents were elucidated with the aid of 1 D-NMR spectroscopy whereas, the structure of new constituent tridbisbithiophene was confirmed via COSY and HMBC interactions.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"80 1","pages":"217 - 221"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77029506","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 : 2002-01-01DOI: 10.1080/10575630290004251
S. Begum, B. Siddiqui, S. Hassan
Three pentacyclic triterpenoids including one new guajavanoic acid ( 2 ) and two known obtusinin ( 1 ) and goreishic acid I ( 3 ) have been isolated from the leaves of Psidium guajava . The new constituent 2 has been characterized as 2 f -hydroxy-3 g - p-E -coumaroyloxyurs-12, 18-dien-28-oic acid through 1 H-NMR and 13 C-NMR (broad band and DEPT). This is the first report of isolation of compound 1 and 3 from the genus Psidium .
{"title":"Triterpenoids from Psidium Guajava Leaves","authors":"S. Begum, B. Siddiqui, S. Hassan","doi":"10.1080/10575630290004251","DOIUrl":"https://doi.org/10.1080/10575630290004251","url":null,"abstract":"Three pentacyclic triterpenoids including one new guajavanoic acid ( 2 ) and two known obtusinin ( 1 ) and goreishic acid I ( 3 ) have been isolated from the leaves of Psidium guajava . The new constituent 2 has been characterized as 2 f -hydroxy-3 g - p-E -coumaroyloxyurs-12, 18-dien-28-oic acid through 1 H-NMR and 13 C-NMR (broad band and DEPT). This is the first report of isolation of compound 1 and 3 from the genus Psidium .","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"95 1","pages":"173 - 177"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78079920","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 : 2002-01-01DOI: 10.1080/10575630290019958
A. Bianco, F. Bonadies, V. Cianciolo, C. Melchioni, Alessia Ramunno, S. Dezzi, M. Nicoletti, M. Serafini, M. Ballero
Argylia radiata (L.) D. Don (Bignoniaceae) represents an important source of secondary metabolites, largely unexplored. The paper presents the isolation from the plant root of two new monoterpene alkaloids, 10-acetoxy-actinidine and 4-nor-7,8-dehydro-10-hydroxy-skytanthine, whose structures were elucidated by Mass spectrometry and 1 H-NMR data.
辐射银腹(L.)D. Don (Bignoniaceae)是次生代谢物的重要来源，很大程度上尚未开发。本文从植物根中分离到两种新的单萜类生物碱，10-乙酰氧基-锕和4-对-7,8-脱氢-10-羟基-天丁氨酸，并通过质谱和1h - nmr数据对其结构进行了鉴定。
{"title":"Monoterpene Alkaloids from Argylia Radiata","authors":"A. Bianco, F. Bonadies, V. Cianciolo, C. Melchioni, Alessia Ramunno, S. Dezzi, M. Nicoletti, M. Serafini, M. Ballero","doi":"10.1080/10575630290019958","DOIUrl":"https://doi.org/10.1080/10575630290019958","url":null,"abstract":"Argylia radiata (L.) D. Don (Bignoniaceae) represents an important source of secondary metabolites, largely unexplored. The paper presents the isolation from the plant root of two new monoterpene alkaloids, 10-acetoxy-actinidine and 4-nor-7,8-dehydro-10-hydroxy-skytanthine, whose structures were elucidated by Mass spectrometry and 1 H-NMR data.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"82 1","pages":"77 - 80"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76048930","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 : 2002-01-01DOI: 10.1080/10575630290020019
H. Al-Hazimi, S. Haque
A new naphthoquinone, 6-methoxyplumbagin was isolated from the acetone extracts of Polygonum aviculare . Its structure was elucidated by various spectroscopic methods. The known compounds sitosterol, oleanolic acid and 5,6,7,4'-tetramethoxyflavanone were also obtained from this natural source.
{"title":"A New Naphthoquinone from Polygonum Aviculare","authors":"H. Al-Hazimi, S. Haque","doi":"10.1080/10575630290020019","DOIUrl":"https://doi.org/10.1080/10575630290020019","url":null,"abstract":"A new naphthoquinone, 6-methoxyplumbagin was isolated from the acetone extracts of Polygonum aviculare . Its structure was elucidated by various spectroscopic methods. The known compounds sitosterol, oleanolic acid and 5,6,7,4'-tetramethoxyflavanone were also obtained from this natural source.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"38 1","pages":"115 - 118"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80348755","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 : 2002-01-01DOI: 10.1080/1057563029001/4764
F. Filleur, C. Pouget, D. Allais, M. Kaouadji, A. Chulia
The petrol extract from mace of Myristica argentea Warb. afforded six phenylpropenes, three lignans, three neolignans and a dilignan, bis erythro-argenteane ( 4 ) or rel-(8R,8'S,8"S,8"'R)-5',5"'-bis(7-(3,4-methylenedioxyphenyl)-7'-(4'-hydroxy-3'-methoxyphenyl)-8.8'-lignane]. The last-named compound is a new natural product.
{"title":"Lignans and Neolignans from Myristica Argentea1 Warb","authors":"F. Filleur, C. Pouget, D. Allais, M. Kaouadji, A. Chulia","doi":"10.1080/1057563029001/4764","DOIUrl":"https://doi.org/10.1080/1057563029001/4764","url":null,"abstract":"The petrol extract from mace of Myristica argentea Warb. afforded six phenylpropenes, three lignans, three neolignans and a dilignan, bis erythro-argenteane ( 4 ) or rel-(8R,8'S,8\"S,8\"'R)-5',5\"'-bis(7-(3,4-methylenedioxyphenyl)-7'-(4'-hydroxy-3'-methoxyphenyl)-8.8'-lignane]. The last-named compound is a new natural product.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"18 1","pages":"1 - 7"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83009829","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 : 2002-01-01DOI: 10.1080/1057563029001/4872
Keriman Günaydın, G. Topçu, Rodıca Marıana Ion
From the roots of Rumex crispus, two known anthraquinones and a new one together with a new anthrone were isolated and the structures of compounds 1 - 4 were elucidated by spectroscopic means. The singlet oxygen generation capacity was tested with 1,3-diphenylisobenzofuran (DPBF) for compounds 1 - 4 .
{"title":"1,5-Dihydroxyanthraquinones and an Anthrone from Roots of Rumex Crispus","authors":"Keriman Günaydın, G. Topçu, Rodıca Marıana Ion","doi":"10.1080/1057563029001/4872","DOIUrl":"https://doi.org/10.1080/1057563029001/4872","url":null,"abstract":"From the roots of Rumex crispus, two known anthraquinones and a new one together with a new anthrone were isolated and the structures of compounds 1 - 4 were elucidated by spectroscopic means. The singlet oxygen generation capacity was tested with 1,3-diphenylisobenzofuran (DPBF) for compounds 1 - 4 .","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"52 1","pages":"65 - 70"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83784684","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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