Abstract
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), daphnicyclidin H (3), deoxyyuzurimine (4), and yuzurimine (5). The structures were elucidated on the basis of spectroscopic data. The configuration of 1 was elucidated by single-crystal X-ray diffraction crystallography.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Alkaloids / chemistry
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Anions
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Crystallography, X-Ray
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Cyclopentanes / chemistry*
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Ethanol / chemistry
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Magnetic Resonance Spectroscopy
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Magnoliopsida / metabolism*
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Models, Chemical
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Models, Molecular
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Nitrogen / chemistry
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Plant Extracts / chemistry*
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Plants, Medicinal / metabolism
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Polycyclic Compounds / chemistry*
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Spectrometry, Mass, Electrospray Ionization
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Spectrophotometry
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Temperature
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X-Ray Diffraction
Substances
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Alkaloids
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Anions
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Cyclopentanes
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Plant Extracts
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Polycyclic Compounds
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daphnicyclidin L
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Ethanol
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Nitrogen