Pub Date : 2002-01-01DOI: 10.1080/10575630290004260
M. Ali, Muhammad Jahangir, Syed Shah Uzair, Ayman Wahba Erian, Rasool Bakhsh Tareen
The ethyl acetate soluble part of the chloroform extract of Pulicaria gnaphalodes belonging to the family Asteraceae afforded a new sesquiterpene-dimer of guaiane class named as gnapholide and anabsinthin of the same skeleton. The structures of both the compounds were elucidated with the aid of spectroscopic techniques including 2D NMR.
{"title":"Gnapholide: A New Guaiac-Dimer from Pulicaria Gnaphalodes (Asteraceae)","authors":"M. Ali, Muhammad Jahangir, Syed Shah Uzair, Ayman Wahba Erian, Rasool Bakhsh Tareen","doi":"10.1080/10575630290004260","DOIUrl":"https://doi.org/10.1080/10575630290004260","url":null,"abstract":"The ethyl acetate soluble part of the chloroform extract of Pulicaria gnaphalodes belonging to the family Asteraceae afforded a new sesquiterpene-dimer of guaiane class named as gnapholide and anabsinthin of the same skeleton. The structures of both the compounds were elucidated with the aid of spectroscopic techniques including 2D NMR.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"23 1","pages":"179 - 186"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82527588","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: 10.1080/10575630290004206
B. Datta, S. Datta, M. Rashid, J. Kundu, C. Hasan, S. Sarker
Two new sesquiterpenes, 4-methoxycarbonyl-7-(1-methylethyl)-6-oxo-3,3a,7,8,8a-pentahydroazulene-1-carboxylic acid (viscoazusone) and 1,4-dimethoxy-carbonyl-7-(1-methylethyl)-6-oxo-3,3a,7,8,8a-pentahydroazulene (viscoazulone), were isolated from the whole plant of Polygonum viscosum . The structures of these compounds were determined by spectroscopic means.
{"title":"Further Sesquiterpenes from Polygonum Viscosum (Polygonaceae)","authors":"B. Datta, S. Datta, M. Rashid, J. Kundu, C. Hasan, S. Sarker","doi":"10.1080/10575630290004206","DOIUrl":"https://doi.org/10.1080/10575630290004206","url":null,"abstract":"Two new sesquiterpenes, 4-methoxycarbonyl-7-(1-methylethyl)-6-oxo-3,3a,7,8,8a-pentahydroazulene-1-carboxylic acid (viscoazusone) and 1,4-dimethoxy-carbonyl-7-(1-methylethyl)-6-oxo-3,3a,7,8,8a-pentahydroazulene (viscoazulone), were isolated from the whole plant of Polygonum viscosum . The structures of these compounds were determined by spectroscopic means.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"3 1","pages":"143 - 148"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81965951","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: 10.1080/1057563029001/4755
L. P. Mai, D. Guénard, M. Fránck, M. Van Tri, C. Gaspard, T. Sévenet
An extract of the fruits of Trichosanthes tricuspidata collected in North Vietnam was found cytotoxic in KB cells. A bioassay-guided fractionation led to the isolation of a series of cucurbitacins of which two are new:tricuspidatin and 2-O-glucocucurbitacin J. Their isolation and structure determination are described.
在越南北部收集的tricuspidata果实提取物被发现对KB细胞有细胞毒性。用生物测定法分离了一系列葫芦素，其中两种是新发现的:三葡萄糖苷和2- o -糖葫芦素j。
{"title":"New Cytotoxic Cucurbitacins from the Pericarps of Trichosanthes Tricuspidata Fruits","authors":"L. P. Mai, D. Guénard, M. Fránck, M. Van Tri, C. Gaspard, T. Sévenet","doi":"10.1080/1057563029001/4755","DOIUrl":"https://doi.org/10.1080/1057563029001/4755","url":null,"abstract":"An extract of the fruits of Trichosanthes tricuspidata collected in North Vietnam was found cytotoxic in KB cells. A bioassay-guided fractionation led to the isolation of a series of cucurbitacins of which two are new:tricuspidatin and 2-O-glucocucurbitacin J. Their isolation and structure determination are described.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"29 1","pages":"15 - 19"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83632335","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: 10.1080/10.575630290015736
F. Beltrame, A. Ferreira, D. Cortez
From the aerial parts of Cissus sicyoides , a new coumarin glycoside 5,6,7,8-tetrahydroxycoumarin-5 g -xylopyranoside was obtained together with known coumarin sabandin, two flavonoids kaempferol 3-rhamnoside and quercetin 3-rhamnoside and two steroids, sitosterol and 3 g - O - g - d -glucopyranosylsitosterol. The structure of compounds was elucidated by spectral analyses.
从茜草的地上部分分离得到新的香豆素糖苷5,6,7,8-四羟基香豆素-5 g -木吡喃苷、已知香豆素沙山苷、山奈酚3-鼠李糖苷和槲皮素3-鼠李糖苷类黄酮和甾体谷甾醇和3 g - O -g -葡萄糖吡喃糖甾醇。化合物的结构通过光谱分析得到了证实。
{"title":"Coumarin Glycoside from Cissus Sicyoides","authors":"F. Beltrame, A. Ferreira, D. Cortez","doi":"10.1080/10.575630290015736","DOIUrl":"https://doi.org/10.1080/10.575630290015736","url":null,"abstract":"From the aerial parts of Cissus sicyoides , a new coumarin glycoside 5,6,7,8-tetrahydroxycoumarin-5 g -xylopyranoside was obtained together with known coumarin sabandin, two flavonoids kaempferol 3-rhamnoside and quercetin 3-rhamnoside and two steroids, sitosterol and 3 g - O - g - d -glucopyranosylsitosterol. The structure of compounds was elucidated by spectral analyses.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"149 1","pages":"213 - 216"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75756058","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: 10.1080/1057563029001/4836
S. Chaudhuri, R. Badisa, E. Pilarinou, E. Walker
Bioassay-guided fractionation allowed the isolation of two new cytotoxic ent-kaurene diterpenoids, licamichauxiioic-A and -B acids (1 and 2) from the root extract of Licania michauxii Prance (Chrysobalanaceae). They were characterized as ent-15-oxo-9(11),16-kauradien-19-oic acid (1) and ent-15-oxo-13(14),16-kauradien-19-oic acid (2) by various spectroscopic methods, in particular, 1D and 2D NMR spectra, and chemical evidence.
{"title":"Licamichauxiioic-A and -B Acids - Two Ent-Kaurene Diterpenoids from Licania Michauxii","authors":"S. Chaudhuri, R. Badisa, E. Pilarinou, E. Walker","doi":"10.1080/1057563029001/4836","DOIUrl":"https://doi.org/10.1080/1057563029001/4836","url":null,"abstract":"Bioassay-guided fractionation allowed the isolation of two new cytotoxic ent-kaurene diterpenoids, licamichauxiioic-A and -B acids (1 and 2) from the root extract of Licania michauxii Prance (Chrysobalanaceae). They were characterized as ent-15-oxo-9(11),16-kauradien-19-oic acid (1) and ent-15-oxo-13(14),16-kauradien-19-oic acid (2) by various spectroscopic methods, in particular, 1D and 2D NMR spectra, and chemical evidence.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"540 1","pages":"39 - 45"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76177904","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: 10.1080/105756302900042247
B. Yu, Jian-Yong Chen, Tianyou Zhou, K. Cheng, G. Qin
Nitrotyrasacutuminine, an unusual nitrated morphine-type alkaloid was isolated from the roots of Menispermum dauricum . Its structure was determined by various 2D spectra and chemical methods.
{"title":"Nitrotyrasacutuminine from Menispermum dauricum","authors":"B. Yu, Jian-Yong Chen, Tianyou Zhou, K. Cheng, G. Qin","doi":"10.1080/105756302900042247","DOIUrl":"https://doi.org/10.1080/105756302900042247","url":null,"abstract":"Nitrotyrasacutuminine, an unusual nitrated morphine-type alkaloid was isolated from the roots of Menispermum dauricum . Its structure was determined by various 2D spectra and chemical methods.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"16 1","pages":"155 - 159"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81819754","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: 10.1080/10575630290020569
P. Nan, S. Peng, Yinhua Zhang, Y. Zhong
Primula obconica was introduced to Europe from Hubei, China in 1880, and has been cultivated worldwide as one of popular ornamental plants. The volatile oil of wild P. obconica collected from its original place, Yichang, Hubei was first investigated. A total of 43 compounds constituting 93.49% of the oil were identified by using GC and GC-MS. The major compounds were methyl 2,4-dihydroxy-5-methyl benzoate (30.41%), methyl 2,6-dihydroxy-4-methyl benzoate (29.27%), and hypnone (8.92%) etc. In comparison with the published data of some European cultivars, the native P. obconica seems to be allergen-free due to absence of primin and miconidin.
{"title":"Composition of Volatile Oil of Primula Obconica in Central China","authors":"P. Nan, S. Peng, Yinhua Zhang, Y. Zhong","doi":"10.1080/10575630290020569","DOIUrl":"https://doi.org/10.1080/10575630290020569","url":null,"abstract":"Primula obconica was introduced to Europe from Hubei, China in 1880, and has been cultivated worldwide as one of popular ornamental plants. The volatile oil of wild P. obconica collected from its original place, Yichang, Hubei was first investigated. A total of 43 compounds constituting 93.49% of the oil were identified by using GC and GC-MS. The major compounds were methyl 2,4-dihydroxy-5-methyl benzoate (30.41%), methyl 2,6-dihydroxy-4-methyl benzoate (29.27%), and hypnone (8.92%) etc. In comparison with the published data of some European cultivars, the native P. obconica seems to be allergen-free due to absence of primin and miconidin.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"63 1","pages":"249 - 253"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86896817","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: 10.1080/10575630290013954
S. De Stefano, R. Nicoletti, Salvatore Zambardino, A. Milone
A novel metabolite related to the previously identified compound 3- O -methylfunicone ( 1 ) was isolated from the fungus Penicillium pinophilum and its structure elucidated by spectral analysis as 3- O -methyl-5, 6-epoxyfunicone ( 2 ).
从真菌pinophilum Penicillium pinophilum中分离到一种与先前鉴定的化合物3- O -methylfunicone(1)相关的新代谢物，通过光谱分析证实其结构为3- O -methyl- 5,6 -epoxyfunicone(2)。
{"title":"Structure Elucidation of a Novel Funicone-Like Compound Produced by Penicillium Pinophilum","authors":"S. De Stefano, R. Nicoletti, Salvatore Zambardino, A. Milone","doi":"10.1080/10575630290013954","DOIUrl":"https://doi.org/10.1080/10575630290013954","url":null,"abstract":"A novel metabolite related to the previously identified compound 3- O -methylfunicone ( 1 ) was isolated from the fungus Penicillium pinophilum and its structure elucidated by spectral analysis as 3- O -methyl-5, 6-epoxyfunicone ( 2 ).","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"4 1","pages":"207 - 211"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88859621","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: 10.1080/10575630290020668
A. S. Moreira, L. Mathias, R. Braz-Filho, J. Schripsema, I. Vieira
Flindersia brayleyana F. Muell. contains the diprenylated coumarins 1 and 2 , in addition to the known coumarins braylin ( 3 ) and brayleyanin ( 4 ). The structures of the new natural products were elucidated by extensive NMR analysis and mass spectra.
弗林德属brayleyana F. Muell。除了已知的香豆素braylin(3)和brayleyanin(4)外，还含有二烯基化香豆素1和2。新的天然产物的结构通过广泛的核磁共振分析和质谱分析得到了证实。
{"title":"Two New Diprenylated Coumarins from Flindersia Brayleyana","authors":"A. S. Moreira, L. Mathias, R. Braz-Filho, J. Schripsema, I. Vieira","doi":"10.1080/10575630290020668","DOIUrl":"https://doi.org/10.1080/10575630290020668","url":null,"abstract":"Flindersia brayleyana F. Muell. contains the diprenylated coumarins 1 and 2 , in addition to the known coumarins braylin ( 3 ) and brayleyanin ( 4 ). The structures of the new natural products were elucidated by extensive NMR analysis and mass spectra.","PeriodicalId":18873,"journal":{"name":"Natural Product Letters","volume":"55 1","pages":"291 - 295"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76017479","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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