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Four new labdane-type diterpenoid glycosides from Diplopterygium laevissimum
Collect
Ming-Ming LI, Kou WANG, Juan HE, Li-Yan PENG, Xuan-Qin CHEN, Xiao CHENG, Qin-Shi ZHAO
Natural Products and Bioprospecting. 2013, 3 (2): 38-42.
DOI: 10.1007/s13659-012-0022-3
Four new labdane-type diterpenoid glycosides, laevissiosides A-D (1-4) were isolated from the 95% ethanol extract of Diplopterygium laevissimum (Christ) Nakai, along with two known analogues, 18-β-D-glucopyranosyl ester-sclareol (5) and 18-hydroxy-sclareol (6). The structures of compounds 1-4 were elucidated by extensive 1D and 2D NMR spectroscopy as well as high-resolution MS analyses. All isolated compounds were evaluated for their cytotoxic effects.
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New monoterpene phenyl ethers from Illicium micranthum
Collect
Zheng-Ye GUAN, Chuan-Fu DONG, Li GAO, Jia-Ping WANG, Shi-De LUO, Yi-Fen WANG
Natural Products and Bioprospecting. 2013, 3 (2): 43-47.
DOI: 10.1007/s13659-013-0007-x
Seven new monoterpene phenyl ethers, namely micranthumnins A-G (1-7), were isolated from the stem bark of Illicium micranthum (Illiciaceae). Their structures were elucidated by comprehensive spectroscopic analyses including MS, IR, 1D and 2D NMR. All compounds were evaluated for their anti-AChE activities.
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Five new 5, 6-seco-tremulane sesquiterpenoids from the basidiomycete Conocybe siliginea
Collect
Xiao-Yan YANG, Tao FENG, Jian-Hai DING, Xia YIN, Hua GUO, Zheng-Hui LI, Ji-Kai LIU
Natural Products and Bioprospecting. 2013, 3 (2): 48-51.
DOI: 10.1007/s13659-013-0003-1
Five new 5,6-seco-tremulane sesquiterpenoids (1-5), as well as three known analogues (6-8), were isolated from the basidiomycete Conocybe siliginea. The structures of new compounds were elucidated by extensive spectroscopic methods. The known compounds were identified by comparing their spectroscopic data with those reported in the literature.
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New Lycopodium alkaloids from Lycopodium obscurum
Collect
Xue-Yuan ZHANG, Liao-Bin DONG, Fei LIU, Xing-De WU, Juan HE, Li-Yan PENG, Huai-Rong LUO, Qin-Shi ZHAO
Natural Products and Bioprospecting. 2013, 3 (2): 52-55.
DOI: 10.1007/s13659-013-0015-x
Three new Lycopodium alkaloids, obscurumines C-E (1-3), along with nine known compounds, were isolated from the club moss Lycopodium obscurum L. Structures of the new compounds were determined on the basis of their spectroscopic analysis and the relative configurations of 1 were established by X-ray crystallographic analysis. All the new isolates were tested for the acetylcholinesterase (AChE) inhibitory activity.
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Four new lignans from the leaves and stems of Schisandra propinqua var. sinensis
Collect
Shan-Zhai SHANG, Ying-Shan HAN, Yi-Ming SHI, Xue DU, Cheng-Qin LIANG, Mark A. WAINBERG, Zhong-Hua GAO, Wei-Lie XIAO, Han-Dong SUN
Natural Products and Bioprospecting. 2013, 3 (2): 56-60.
DOI: 10.1007/s13659-013-0017-8
Four new tetrahydrofuran lignans, schpropinrins A-D (1-4), together with five known ones, were isolated from the leaves and stems of Schisandra propinqua var. sinensis. Their structures, including absolute configurations, were characterized by means of spectroscopic analysis and ECD calculation. Compounds 1-4 featured a ketal or hemiketal substructure at C-7 and all of the isolates were tested for their anti-HIV integrase activity.
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Five new sucrose esters from the whole plants of Phyllanthus cochinchinensis
Collect
Jian-Qiang ZHAO, Yan-Ming WANG, Dong WANG, Chong-Ren YANG, Min XU, Ying-Jun ZHANG
Natural Products and Bioprospecting. 2013, 3 (2): 61-65.
DOI: 10.1007/s13659-013-0026-7
Chemical investigation of the whole plants of Phyllanthus cochinchinensis (Euphorbiaceae) led to the isolation of five new sucrose benzoyl esters, 3,6'-di-O-benzoylsucrose (1), 3,6'-di-O-benzoyl-2'-O-acetylsucrose (2), 3,6'-di-O-benzoyl-4'-Oacetylsucrose (3), 3,6'-di-O-benzoyl-3'-O-acetylsucrose (4) and 3-O-benzoyl-6'-O-(E)-cinnamoylsucrose (5), together with two known secoiridoid glycosides, jasminoside (6) and jaslanceoside B (7). Their structures were established on the basis of detailed spectroscopic analysis and chemical method.
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Chemical components of Dysoxylum densiflorum
Collect
Ji GU, Sheng-Yan QIAN, Gui-Guang CHENG, Yan LI, Ya-Ping LIU, Xiao-Dong LUO
Natural Products and Bioprospecting. 2013, 3 (2): 66-69.
DOI: 10.1007/s13659-013-0025-8
Three new diterpenoids, including two halimanes, 5(10),13E-halimadiene-3α,15-diol (1), and 5(10),14-halimadiene-3α,13ξ-diol (2), one labdane, 12-(3-methyl-furan)-labd-8(17)-en-19-oic acid (3), together with sixteen known compounds were isolated from the barks of Dysoxylum densiflorum. All compounds were elucidated by extensive spectroscopic analysis.
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Chemical components of Dendrobium crepidatum and their neurite outgrowth enhancing activities
Collect
Cheng-Bo LI, Cong WANG, Wei-Wei FAN, Fa-Wu DONG, Feng-Qing XU, Qin-Li WAN, Huai-Rong LUO, Yu-Qing LIU, Jiang-Miao HU, Jun ZHOU
Natural Products and Bioprospecting. 2013, 3 (2): 70-73.
DOI: 10.1007/s13659-012-0103-3
15 compounds, including two new ones crepidatuols A (1) and B (2) were isolated from the stems of Dendrobium crepidatum. The planar structures of these compounds were elucidated by spectroscopic methods (NMR, MS, UV, and IR) and comparison with those from literatures. 10 compounds were send for enhancing activities on nerve growth factor (NGF) medicated neurite outgrowth in PC12 cells and the results indicated that crepidatuol A (1), confusarin and 3-(2-acetoxy-5-methoxy)-phenylpropanol showed enhancing activities at the concentration of 10.0 μM.
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