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uvaria versicolor/dioxyde de silicium
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[Chemical constituents of Uvaria kurzii].
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OBJECTIVE
To investigate the chemical constituents of the branches and leaves of (Jvariu kurzii.
METHODS
Compounds were isolated and purified by silica gel and Sephadex LH-20 column chromatography. Their chemical structures were identified on the basis of physicoc hemical properties and spectral
[Alkaloids and anthraquinones from branches and leaves of uvaria kurzii].
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OBJECTIVE
To investigate the chemical constituents of the branches and leaves of Uvaria kurzii.
METHODS
The compounds were isolated and purified by silica gel and Sephadex LH-20 column chromatographic methods. Their chemical structures were elucidated on the basis of physicochemical properties and
[Amides from the stems of Uvaria kweichowensis].
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Uvaria kweichowensis is a folk nongovernmental herb used to treat cure inflammation and tumour in the Southwest area of China. During the course of our investigation for antitumour agents from the stems of Uvaria kweichowensis, six amides were obtained by means of solvent extraction, chromatography
[A study on major chemical components of Uvaria grandiflora].
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OBJECTIVE
To make clear the chemical constituents of Uvaria grandiflora (Annonaceae).
METHODS
Purification was performed using sephadex LH-20 permeation and silica gel chromatography. Structures of the purified components were determined on the basis of 1H, 13C NMR analysis and also by comparison
[Study on the chemical constituents of Uvaria microcarpa].
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OBJECTIVE
To study the chemical constituents of Uvaria microcarpa.
METHODS
The constituents were repeatedly separated and purified with silica gel column and Sephadex LH-20 column, and identified by physico-chemical properties and spectral methods.
RESULTS
Nine compounds were separated and
[Study on secondary metabolites of endophytic fungus Arthrinium sp. A092 from Uvaria microcarpa].
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OBJECTIVE
To study the secondary metabolites of the endophytic fungus Arthrinium sp. A092 from Uvaria microcarpa.
METHODS
The compounds were isolated and purified by silica gel column chromatography, reverse silica gel column chromatography, Sephadex LH-20 column chromatography, HPLC, preparative
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