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Chemotaxonomic Studies on Equisetaceous Plants in China


 The present paper deals mainly with the chemical contents of the family Equ-
isetaceae in China.  The taxonomic value of the flavonol in this family is discussed.
      The results of chemical investigation show that kaempferol-3,7-diglucoside and kaempfe-
rol are the characteristic components of the family; kaempferol-3-diglucoside is characteristic of
the genus Hippochaete and quercetin is characteristic of the genus Equisetum.
      Described in this paper are isolation of 11 compounds and identification of 7 compounds
in this experiment, among which kaempferol-3-diglucoside and succinic acid are isolated from
Hippochaete hiemale for the first time.


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