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  • 标题:Microtropins Q–W, ent-Labdane Glucosides: Microtropiosides G–I, Ursane-Type Triterpene Diglucoside and Flavonol Glycoside from the Leaves of Microtropis japonica
  • 本地全文:下载
  • 作者:Saori Terazawa ; Yuka Uemura ; Yuka Koyama
  • 期刊名称:Chemical and Pharmaceutical Bulletin
  • 印刷版ISSN:0009-2363
  • 电子版ISSN:1347-5223
  • 出版年度:2017
  • 卷号:65
  • 期号:10
  • 页码:930-939
  • DOI:10.1248/cpb.c17-00459
  • 语种:English
  • 出版社:The Pharmaceutical Society of Japan
  • 摘要:

    Microtropins Q–W, (2 S ,3 R )-2-ethyl-2,3-dihydroxybutyrate of various glucosides and glucose, as well as three ent -labdane diterpenoid glucosides, named microtropiosides G, H and I, an ursane-type triterpene diglucoside and a flavonoid glycoside were isolated from the MeOH extract of the leaves of Microtropis japonica . The structure of microtropioside A, also isolated from the branches of M. japonica , was elucidated spectroscopically in a previous experiment and was found to possess a rare seven-membered oxyrane ring. Its structure was confirmed by X-ray crystallographic analysis of its pentaacetate.

  • 关键词:Microtropis japonica;Celastraceae;microtropin;microtropioside;ent-labdane glucoside;flavonol glycoside
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