A New Flavanone from Spatholobus Suberectus Dunn

2018 ◽  
Vol 42 (10) ◽  
pp. 529-530 ◽  
Author(s):  
Ruo-Xi Liu ◽  
Yi-Lian Xu ◽  
Lie-Feng Ma ◽  
You-Min Ying ◽  
Zha-Jun Zhan
Keyword(s):  
Spectroscopic Data ◽  
2D Nmr ◽  
Esi Ms ◽  
Spatholobus Suberectus ◽  
Ethanol Extracts

A new flavanone, namely 2-(S)-6,7,3’,5′-tetrahydroxyflavanone, was separated from the ethanol extracts of the dried vine stems of Spatholobus suberectus dunn, together with three known ones, 2-(S)-7,3’,5′-trihydroxyflavanone, liquiritigenin and butin. The structure of the new flavanone was identified by detailed analyses of the spectroscopic data, especially 1D and 2D NMR, and HR-ESI-MS.

Pseurotin A1 and A2, two new 1-oxa-7-azaspiro[4.4]non-2-ene-4,6-diones from the holothurian-derived fungus Aspergillus fumigatus WFZ-25

2011 ◽  
Vol 89 (1) ◽  
pp. 72-76 ◽  
Author(s):  
Fa-Zuo Wang ◽  
De-Hai Li ◽  
Tian-Jiao Zhu ◽  
Min Zhang ◽  
Qian-Qun Gu
Keyword(s):  
Circular Dichroism ◽  
Aspergillus Fumigatus ◽  
Spectroscopic Data ◽  
2D Nmr ◽  
Esi Ms ◽  
Extensive Analysis ◽  
Circular Dichroïsm ◽  
New Metabolites

Two new metabolites containing a 1-oxa-7-azaspiro[4.4]non-2-ene-4,6-dione core, pseurotin A1 (1) and A2 (2), as well as pseurotin A (3), were isolated from the holothurian-derived fungus Aspergillus fumigatus WFZ-25. These compounds were determined using extensive analysis of their spectroscopic data, including 1D and 2D NMR, HR-ESI-MS, and circular dichroism (CD) experiments.

scholarly journals Melicope moluccana Antimalarial Activity of Furoquinoline Alkaloids from the Leaves of Melicope moluccana

2020 ◽  
Vol 5 (2) ◽  
pp. 138-142
Author(s):  
Ryan Ayub Wahjoedi ◽  
Ratih Dewi Saputri ◽  
Tjitjik Srie Tjahjandarie ◽  
Mulyadi Tandjung
Keyword(s):  
Plasmodium Falciparum ◽  
Spectral Data ◽  
Spectroscopic Data ◽  
Chemical Structure ◽  
Antimalarial Activity ◽  
2D Nmr ◽  
Esi Ms ◽  
Ic50 Values

Two furoquinoline alkaloids, leptanoine C (1) and haplopine-3,3´-dimethylallyl ether (2) were isolated from the leaves of Melicope moluccana. The chemical structure of both compounds was determined based on spectroscopic data, including UV, IR, HR-ESI-MS, 1D, and 2D NMR spectral data. The antimalarial activity of compounds 1-2 against Plasmodium falciparum 3D7 showing their IC50 values are 0.18 ppm and 2.28 µg/mL, respectively.

A new eudesmane sesquiterpene from Senecio cannabifolius

2009 ◽  
Vol 2009 (7) ◽  
pp. 457-458 ◽  
Author(s):  
Xue Gao ◽  
Xiaohong Deng
Keyword(s):  
Nmr Spectroscopy ◽  
Spectroscopic Data ◽  
2D Nmr ◽  
2D Nmr Spectroscopy ◽  
Esi Ms

A new eudesmane sesquiterpene was isolated from the roots of Senecio cannabifolius. Its structure was established as 1-oxo-5α, 7αH-eudesma-3-en-15-al on the basis of spectroscopic data, including IR, EI-MS, HR-ESI-MS, 1D and 2D NMR spectroscopy.

scholarly journals Salpleflavone, A New Flavone Glucoside from Salvia Plebeia

2018 ◽  
Vol 42 (6) ◽  
pp. 294-296 ◽  
Author(s):  
Hang-Fei Yu ◽  
Hong Zhao ◽  
Ruo-Xi Liu ◽  
Lie-Feng Ma ◽  
Zha-Jun Zhan
Keyword(s):  
Spectroscopic Data ◽  
2D Nmr ◽  
Esi Ms ◽  
Aerial Parts

Salpleflavone, a new flavone glucoside bearing a sinapinoyl moiety, was isolated from the aerial parts of Salvia plebeia R. Br., together with three known compounds, salplebeone A, salplebeone D and 6- O-methyl-scutellarein. The structure of the new compound was established by detailed analyses of the spectroscopic data, especially 1D and 2D NMR and HR-ESI-MS.

A new norditerpenoid lactone from the seeds of Podocarpus nakaii

2019 ◽  
Vol 43 (3-4) ◽  
pp. 127-129
Author(s):  
Xiao-Xiao Chen ◽  
Wei-Guang Shan ◽  
You-Min Ying ◽  
Lie-Feng Ma ◽  
Zha-Jun Zhan
Keyword(s):  
Spectroscopic Data ◽  
2D Nmr ◽  
Esi Ms

A new norditerpenoid lactone, nakaiilactone A was isolated from the seeds of Podocarpus nakaii together with a known one, nagilactone C and a known bisnorditerpenoid lactone, inumakilactone B. The structure of the new compound was determined by detailed analyses of the spectroscopic data, especially 1D- and 2D-NMR and HR-ESI-MS.

scholarly journals Two New Carboxyethylflavanones from the Heartwood of Dalbergia tonkinensis and Their Antimicrobial Activities

2017 ◽  
Vol 12 (11) ◽  
pp. 1934578X1701201 ◽  
Author(s):  
Ninh The Son ◽  
Kenichi Harada ◽  
Nguyen Manh Cuong ◽  
Yoshiyasu Fukuyama
Keyword(s):  
Filamentous Fungus ◽  
Spectroscopic Data ◽  
2D Nmr ◽  
Antimicrobial Activities ◽  
Esi Ms ◽  
Chemical Structures ◽  
Dalbergia Tonkinensis ◽  
New Compounds ◽  
Antimicrobial Assay ◽  
Mic Value

Two new carboxyethylflavanone derivatives, (2 S)-8-carboxyethylnarigenin (2) and (2 S)-6,8-dicarboxyethylpinocembrin (3) were isolated from the heartwood of Dalbergia tonkinensis Prain, along with four known compounds 1, and 4-6. The chemical structures of two new compounds 2 and 3 were elucidated based on analyses of the spectroscopic data, including 1D and 2D NMR, HR-ESI-MS, IR, UV, and CD spectroscopies. By carrying out antimicrobial assay, CH3OH and CHCl3 fractions exhibited weak MIC value at 200 μg/mL against filamentous fungus A. niger (439), whereas the known flavanone 1 and the new carboxyethylflavanone 2 had MIC at 100 μg/mL.

A New Pyrrolizidine Alkaloid from Penicillium Expansum

2017 ◽  
Vol 41 (2) ◽  
pp. 93-94
Author(s):  
Xue-Peng Chen ◽  
Lie-Feng Ma ◽  
Zha-Jun Zhan
Keyword(s):  
Spectroscopic Data ◽  
Pyrrolizidine Alkaloid ◽  
2D Nmr ◽  
Penicillium Expansum ◽  
Esi Ms

A new pyrrolizidine alkaloid with an unusual O-bridge, named penexpandine, was isolated from the cultures of Penicillium expansum ACCC 30904, together with two known alkaloids, communesins A and B. The structure of the new compound was established by detailed analyses of the spectroscopic data, especially 1D- and 2D-NMR and HR-ESI-MS

scholarly journals Phenylhydrazone and Quinazoline Derivatives from the Cold-Seep-Derived Fungus Penicillium oxalicum

Marine Drugs ◽  
2020 ◽  
Vol 19 (1) ◽  
pp. 9
Author(s):  
Ya-Ping Liu ◽  
Sheng-Tao Fang ◽  
Zhen-Zhen Shi ◽  
Bin-Gui Wang ◽  
Xiao-Nian Li ◽  
...  
Keyword(s):  
Deep Sea ◽  
Spectroscopic Data ◽  
2D Nmr ◽  
Penicillium Oxalicum ◽  
Marine Phytoplankton ◽  
Cold Seep ◽  
Phytoplankton Species ◽  
X Ray ◽  
X Ray Crystallography ◽  
Quinazoline Derivatives

Three new phenylhydrazones, penoxahydrazones A–C (compounds 1–3), and two new quinazolines, penoxazolones A (compound 4) and B (compound 5), with unique linkages were isolated from the fungus Penicillium oxalicum obtained from the deep sea cold seep. Their structures and relative configurations were assigned by analysis of 1D/2D NMR and mass spectroscopic data, and the absolute configurations of 1, 4, and 5 were established on the basis of X-ray crystallography or ECD calculations. Compound 1 represents the first natural phenylhydrazone-bearing steroid, while compounds 2 and 3 are rarely occurring phenylhydrazone tautomers. Compounds 4 and 5 are enantiomers that feature quinazoline and cinnamic acid units. Some isolates exhibited inhibition of several marine phytoplankton species and marine-derived bacteria.

scholarly journals Antimicrobial Coumarins from the Stem Bark of Afraegle paniculata

2010 ◽  
Vol 5 (4) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Valerie Beatrice Tsassi ◽  
Hidayat Hussain ◽  
Bouberte Yemele Meffo ◽  
Simeon F. Kouam ◽  
Etienne Dongo ◽  
...  
Keyword(s):  
Natural Product ◽  
Dimethyl Ether ◽  
Spectroscopic Data ◽  
2D Nmr ◽  
Stem Bark

Eight compounds were isolated from the stem bark of the plant Afraegle paniculata. One of them, a dimethyl ether of S-trans-marmin (1), is reported as a new natural product. The structures were determined by comprehensive analyses of their 1D and 2D NMR spectroscopic and HREIMS data. The remaining seven known compounds, identified by comparing their spectroscopic data with those reported in the literature, were S-trans-marmin (2), psoralene (3), bergaptene (4), imperatorin (5), 2-(4-hydroxy-3,5-dimethoxyphenyl)-3-hydroxymethyl-2,3-dihydro-1,4,5-trioxaphenanthren-6-one (6), xanthoxyletin (7), and β-sitosterol glucopyranoside. Preliminary studies indicated that compounds 2, 3, 5, and 7 showed potent antibacterial, fungicidal, and algicidal properties, while 6 showed only moderate algicidal property.

Flavon- and Flavonolglycosides from Achillea pannonica Scheele

2001 ◽  
Vol 56 (7-8) ◽  
pp. 521-525 ◽  
Author(s):  
Denata Kasaj ◽  
Liselotte Krenn ◽  
Sonja Prinz ◽  
Antje Hüfner ◽  
Shi Shan Yuc ◽  
...  
Keyword(s):  
Methanolic Extract ◽  
2D Nmr ◽  
Flavonoid Glycosides ◽  
Spectroscopic Methods ◽  
Esi Ms ◽  
Aerial Parts ◽  
Nmr Techniques ◽  
Chemotaxonomic Study ◽  
First Time ◽  
C Nmr

The detailed investigation of a methanolic extract of aerial parts of Achillea pannonica SCHEELE. within a chemotaxonomic study led to the isolation of 6 flavonoid glycosides. Besides rutin, apigenin-7-O-glucopyranoside, luteolin-7-O-glucopyranoside, apigenin-7-O-rutinoside and acacetin-7-O-rutinoside, an unusual flavondiglucoside was isolated. Its structure was established by UV, 1HNMR and 13C NMR spectroscopic methods including 2D-NMR techniques and ESI-MS as luteolin-7,4′-O-β-diglucoside. This substance is reported for the first time in the genus Achillea. Chemotaxonomic aspects are discussed briefly

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