Zobrazeno 1 - 10
of 76
pro vyhledávání: '"B. Jayaprakasam"'
Autor:
Duvvuru Gunasekar, A. Blond, M. Kesava Reddy, Galla Jayakrishna, Bernard Bodo, B. Jayaprakasam
Publikováno v:
Journal of Asian Natural Products Research. 5:83-87
A new biflavonoid, 2,3-dihydroochnaflavone 7,4',7"-tri-O-methyl ether (1) together with two known biflavonoids namely, 2,3-dihydroochnaflavone (2) and ochnaflavone (3) were isolated from the stem bark of Ochna beddomei. The structures were determined
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51db33ddac493b0d5b59613f55a0ac51
https://doi.org/10.1080/1028602021000034100
https://doi.org/10.1080/1028602021000034100
Publikováno v:
Phytochemistry. 52:147-151
Two new acylated flavone glucosides, skullcapflavone I 2′-O-β- d -(3″-E-cinnamoyl)glucopyranoside and skullcapflavone I 2′-O-β- d -(2″-E-cinnamoyl)glucopyranoside, together with skullcapflavone I 2′-O-β- d -glucopyranoside and andrograph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df9551d6aeb60fd78ea1f1685c9f87a2
https://doi.org/10.1016/s0031-9422(99)00113-2
https://doi.org/10.1016/s0031-9422(99)00113-2
Publikováno v:
Journal of Asian Natural Products Research. 1:133-138
A new flavone glucoside, 5,2′,6′-trihydroxy-7-methoxyflavone 2′-O-β-D-glucopyranoside has been isolated from the whole plant of Andrographis alata. The structure was elucidated on the basis of spectral and chemical evidence.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5b368ad4c46ae3388b086e651e49cfa
https://doi.org/10.1080/10286029808039855
https://doi.org/10.1080/10286029808039855
Publikováno v:
Acta Crystallographica Section E Structure Reports Online. 61:o3565-o3567
The γ-pyranone ring of the title molecule, C16H14O5, adopts an envelope conformation. The crystal packing is stabilized by O—H⋯O and C—H⋯O hydrogen bonding.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::875015716f2f1f83d11910e44daebde5
https://doi.org/10.1107/s1600536805030758
https://doi.org/10.1107/s1600536805030758
Publikováno v:
Acta Crystallographica Section E Structure Reports Online. 61:o2862-o2864
Molecules of the title compound, C18H16O6, are almost planar. The dihedral angle between the benzopyran system and the benzene ring is 3.36 (5)°. In addition to an intramolecular O—H⋯O hydrogen bond, molecules are connected by weak inter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ca02de75345c3d981bea3a11d1daa22
https://doi.org/10.1107/s1600536805024827
https://doi.org/10.1107/s1600536805024827
Publikováno v:
ChemInform. 31
A reinvestigation of the whole plant of Andrographis echioides has led to the isolation of a new flavanone, dihydroechioidinin together with four known flavones, echioidinin, echioidin, skullcapflavone I 2′- O -methyl ether, and skullcapflavone I 2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc8653518dc3570a34809cb7945165f3
https://doi.org/10.1002/chin.200010226
https://doi.org/10.1002/chin.200010226
Publikováno v:
ChemInform. 31
A new biflavanone, 7,7′′-di- O -methyltetrahydrohinokiflavone together with tetrahydrohinokiflavone were isolated from the stems of Cycas beddomei . The structures were established on the basis of spectral and chemical studies.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80fed5e0598f809bcb3cd84924a8df3a
https://doi.org/10.1002/chin.200025224
https://doi.org/10.1002/chin.200025224
Publikováno v:
Phytochemistry. 52:935-937
A reinvestigation of the whole plant of Andrographis echioides has led to the isolation of a new flavanone, dihydroechioidinin together with four known flavones, echioidinin, echioidin, skullcapflavone I 2′- O -methyl ether, and skullcapflavone I 2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::289dbc86534b77237ca1a697dd2e2c73
https://doi.org/10.1016/s0031-9422(99)00295-2
https://doi.org/10.1016/s0031-9422(99)00295-2
Publikováno v:
Phytochemistry. 49(6)
A new flavone glycoside, echioidinin 5-glucoside along with its known aglycone, echioidinin have been isolated from the whole plant of Andrographis alata. The structure of the new compound was established as 5,2′-dihydroxy-7-methoxyflavone 5-O-β-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aec2480e93ffd7cf86f2345da59d2867
https://pubmed.ncbi.nlm.nih.gov/11711108
https://pubmed.ncbi.nlm.nih.gov/11711108
Publikováno v:
Journal of Asian natural products research. 3(1)
A new chalcone glucoside, androechin, and a known flavone glucoside, echioidinin 5-O-glucoside, were isolated from the whole plant of Andrographis echioides. Androechin was characterized as 2,2′,6′-trihydroxy-4′-methoxychalcone 2′-O-β-D-gluc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e244bc9fd8ccb9a7b78de58a13af3f1b
https://pubmed.ncbi.nlm.nih.gov/11355769
https://pubmed.ncbi.nlm.nih.gov/11355769