Yao xue xue bao = Acta pharmaceutica Sinica 2005-Mar
Isolation and structure determination of cypritibetquinone A and B, two new phenanthraquinones from Cypripedium tibeticum.
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Prijava / prijava
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Ključne besede
Povzetek
OBJECTIVE
To study the chemical constituents of Cypripedium tibeticum.
METHODS
Compounds were isolated by repeated silica gel chromatography and purified on Sephadex LH-20 and structures were determined by spectral analysis.
RESULTS
Cypritibetquinones A and B were isolated from the ethyl acetate residue and their structures were determined as 7-hydroxy-2-methoxy-1 4-phenanthraquinone (1) and 7-hydroxy-2, 10-dimethoxy-l1 4-phenanthraquinone (2), respectively, by extensive spectral analyses.
CONCLUSIONS
Cypritibetquinones A and B are two new phenanthraquinones.
