In this paper, it is shown that pterodonoic acid may or may not have the structure of 3-oxoeudesma-4,11-dien-12-oic acid 1 by comparison of their spectral data. But it is certainly not 10-epi-3-oxoeudesma-4,11-dien-12...In this paper, it is shown that pterodonoic acid may or may not have the structure of 3-oxoeudesma-4,11-dien-12-oic acid 1 by comparison of their spectral data. But it is certainly not 10-epi-3-oxoeudesma-4,11-dien-12-oic, acid 2, which is synthesized from dihydrocarvone 3.展开更多
Two new triterpenes, 2α,3β-dihydroxyurs- 12-en- 18,19-epoxy-28-oic acid （1） and 18,19-seco, 2α, 2α-dihydroxyl-19-oxo-urs- 11,13（18）-dien-28-oic acid （2） were isolated from the herbaceous part of Duchesnea in...Two new triterpenes, 2α,3β-dihydroxyurs- 12-en- 18,19-epoxy-28-oic acid （1） and 18,19-seco, 2α, 2α-dihydroxyl-19-oxo-urs- 11,13（18）-dien-28-oic acid （2） were isolated from the herbaceous part of Duchesnea indica. Their structures were elucidated by spectroscopic analysis, including 2D NMR technique. The isolated compounds exhibited moderate cytotoxic activities against HeLa and L929 cell lines.展开更多
Phytochemical re-investigation of Coleus xanthanthus led to the isolation andidentification of a novel sesquiterpenoid 1, named as 4,5,1 1-trimethyl-8,9-seco-1(10),7(11) eremophiladien-8,12-olid-9-cio acid. The struct...Phytochemical re-investigation of Coleus xanthanthus led to the isolation andidentification of a novel sesquiterpenoid 1, named as 4,5,1 1-trimethyl-8,9-seco-1(10),7(11) eremophiladien-8,12-olid-9-cio acid. The structure of 1 was elucidated by modern spectroscopicmethods, especially by X-ray diffraction.展开更多
AIM： To investigate the chemical constituents of Fitex negundo. METHOD： Compounds were isolated by different chromatographic methods and their structures were elucidated on the basis of NMR spectroscopy. RESULTS： F...AIM： To investigate the chemical constituents of Fitex negundo. METHOD： Compounds were isolated by different chromatographic methods and their structures were elucidated on the basis of NMR spectroscopy. RESULTS： Four compounds were isolated and identified as 2a, 3a, 24-trihydroxyurs-12, 20（30）-dien-28-oic acid-28-O- β-D-glucopyranosyl ester （1）, corosolic acid （2）, vulgarsaponin A （3） and 2a, 3a, 24-trihydroxyurs-12-en-28-oic acid-28-O-β-D- glucopyranosyl ester （4）, respectively. CONCLUSION： Compound I is a new triterpenoid glycoside.展开更多
文摘In this paper, it is shown that pterodonoic acid may or may not have the structure of 3-oxoeudesma-4,11-dien-12-oic acid 1 by comparison of their spectral data. But it is certainly not 10-epi-3-oxoeudesma-4,11-dien-12-oic, acid 2, which is synthesized from dihydrocarvone 3.
基金sponsored by the Scientific Research Foundation of Tianjin Medical University,Tianjin,China.
文摘Two new triterpenes, 2α,3β-dihydroxyurs- 12-en- 18,19-epoxy-28-oic acid （1） and 18,19-seco, 2α, 2α-dihydroxyl-19-oxo-urs- 11,13（18）-dien-28-oic acid （2） were isolated from the herbaceous part of Duchesnea indica. Their structures were elucidated by spectroscopic analysis, including 2D NMR technique. The isolated compounds exhibited moderate cytotoxic activities against HeLa and L929 cell lines.
文摘Phytochemical re-investigation of Coleus xanthanthus led to the isolation andidentification of a novel sesquiterpenoid 1, named as 4,5,1 1-trimethyl-8,9-seco-1(10),7(11) eremophiladien-8,12-olid-9-cio acid. The structure of 1 was elucidated by modern spectroscopicmethods, especially by X-ray diffraction.
基金supported by the Program for Changjiang Scholars and Innovative Research Team in the University(No.IRT0965)the Team Project of Natural Science Foundation of Guangdong Province(No.8351063201000003)the Science and Technology Planning Project of Guangdong Province(No.2012A080204005)
文摘AIM： To investigate the chemical constituents of Fitex negundo. METHOD： Compounds were isolated by different chromatographic methods and their structures were elucidated on the basis of NMR spectroscopy. RESULTS： Four compounds were isolated and identified as 2a, 3a, 24-trihydroxyurs-12, 20（30）-dien-28-oic acid-28-O- β-D-glucopyranosyl ester （1）, corosolic acid （2）, vulgarsaponin A （3） and 2a, 3a, 24-trihydroxyurs-12-en-28-oic acid-28-O-β-D- glucopyranosyl ester （4）, respectively. CONCLUSION： Compound I is a new triterpenoid glycoside.
