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daphniphyllum macropodum/alkaloid
Nuoroda įrašoma į mainų sritį
Puslapis 1 nuo 83 rezultatus
Daphcalycine, a novel heptacycle fused ring system alkaloid from Daphniphyllum calycinum.
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A novel Daphniphyllum alkaloid, daphcalycine (1), was isolated together with known daphnicyclidin D (2) from the stem bark of Daphniphyllum calycinum. The highly condensed polycyclic structure, established by spectral analysis, possessed an unusual framework: a central quinuclidine like tricycle
Daphmanidins E and F, alkaloids from Daphniphyllum teijsmannii.
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Two new Daphniphyllum alkaloids, daphmanidins E (1) and F (2), have been isolated from the leaves of Daphniphyllum teijsmannii, and the structures were elucidated on the basis of spectroscopic data. Daphmanidins E and F showed a moderate vasorelaxant effect on rat aorta.
[Chemical studies on alkaloids of Chinese medicinal herbs Daphniphyllum macropodum].
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OBJECTIVE
To study the alkaloids of the Chinese medicinal herbs Daphniphyllum macropodum for in search for new bioactive substances.
METHODS
The CHCl3 extract of D. macropodum was subjected to repeated column chromatography on silica gel to afford four pure compounds (1-4). Their structures were
Daphnezomines T--V, alkaloids from Daphniphyllum humile.
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Three new Daphniphyllum alkaloids, daphnezomines T-V (1-3), were isolated from the leaves and branches of Daphniphyllum humile (Daphniphyllaceae). The structures and relative stereochemistry of 1-3 were elucidated on the basis of spectroscopic data. Daphnezomine T (1) is the first alkaloid without a
Daphmacromines A-J, alkaloids from Daphniphyllum macropodum.
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Ten new yuzurine-type Daphniphyllum alkaloids, daphmacromines A-J (1-10), along with seven known alkaloids were isolated from the leaves and stems of Daphniphyllum macropodum. Their structures were elucidated by extensive spectroscopic techniques, including 2D NMR spectroscopy and mass spectrometry,
Two new Daphniphyllum alkaloids from Daphniphyllum macropodum Miq.
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Two new Daphniphyllum alkaloids, 4,21-deacetyl-deoxyyuzurimine (1) and macropodumine L (2), together with the two known related alkaloids, have been isolated from the bark of Daphniphyllum macropodum Miq. The structures of the new compounds were elucidated on the basis of the detailed analysis of
Daphnicyclidins J and K, unique polycyclic alkaloids from Daphniphyllum humile.
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Two Daphniphyllum alkaloids with unprecedented polycyclic skeletons, daphnicyclidins J (1) and K (2), have been isolated from the stems of Daphniphyllum humile, and the structures and relative stereochemistry were elucidated on the basis of spectroscopic data. The absolute stereochemistry of 1 was
Further Daphniphyllum alkaloids with insecticidal activity from the bark of Daphniphyllum macropodum M(IQ).
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Two new Daphniphyllum alkaloids, macropodumines J and K (1 and 2, resp.), together with six known structurally related alkaloids, 3-8, were isolated from the bark of Daphniphyllum macropodum M(IQ). The structures of the new compounds 1 and 2 were elucidated on the basis of a comprehensive analysis
Daphnimacropodines A-D, alkaloids from Daphniphyllum macropodum.
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Four new Daphniphyllum alkaloids, daphnimacropodines A-D (1-4), together with three known ones, daphnilactone B and daphnezomines H and I, were isolated from the fruits of Daphniphyllum macropodum. Their structures were determined by spectroscopic methods, especially 2D NMR techniques.
Daphmacromines K-O, alkaloids from Daphniphyllum macropodum.
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Five new yuzurimine-type Daphniphyllum alkaloids, daphmacromines K-O (1-5), were isolated from the leaves and stems of Daphniphyllum macropodum. Their structures were elucidated by extensive spectroscopic techniques, including 2D NMR spectroscopy and mass spectrometry. Daphmacromine O (5) showed
Macropodumines D and E, two new alkaloids with unusual skeletons from Daphniphyllum macropodum Miq.
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[structure: see text] Two new complex polycyclic alkaloids, macropodumines D (1) and E (2), both possessing unprecedented skeletons, along with four known related alkaloids, were isolated from the leaves and barks of Daphniphyllum macropodum Miq. The structures including the relative stereochemistry
Pordamacrines A and B, alkaloids from Daphniphyllum macropodum.
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The new Daphniphyllum alkaloids, pordamacrines A (1) and B (2), have been isolated from the leaves of Daphniphyllum macropodum, and their structures were elucidated on the basis of interpretation of spectroscopic data and by the single-crystal X-ray diffraction analysis of 2. Pordamacrines A (1) and
A zwitterionic alkaloid, containing a rare cyclopentadienyl anion unit, from the stem barks of Daphniphyllum macropodum Miq.
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A new Daphniphyllum alkaloid daphnicyclidin L (1), containing a rare cyclopentadienyl anion, which is stabilized as a zwitterion by an internal iminium counterion, was isolated from the stem barks of Daphniphyllum macropodum Miq., together with four known alkaloids: daphnicyclidin D (2),
Daphnicyclidins A-H, novel hexa- or pentacyclic alkaloids from two species of Daphniphyllum.
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Eight highly modified Daphniphyllum alkaloids with unprecedented fused hexa- or pentacyclic skeletons, daphnicyclidins A-H (1-8), have been isolated from the stems of Daphniphyllum humile and D.teijsmanni, and their structures were elucidated on the basis of spectroscopic data and chemical means.
Five new alkaloids from the stem bark of Daphniphyllum macropodum.
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Five new alkaloids, daphnicyclidins M and N (compounds 1 and 2) and calyciphyllines Q-S (compounds 3-5), along with four known ones, paxiphylline C (6), macropodumine B (7), macropodumine C (8) and daphnicyclidin A (9) were isolated from the stem bark of Daphniphyllum macropodum. Calyciphylline Q
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