Structures of Alnusiin and Bicornin, New Hydrolyzable Tannins Having a Monolactonized Tergalloyl Group

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From the fruit extract of Alnus sieboldiana, a new hydrolyzable tannin, alnusiin (1), was isolated together with five known tannins : tellimagrandin I (6), pedunculagin (7), casuarinin (9), casuariin (10) and 2,3-O-(S)-hexahydroxydiphenoyl-D-glucose (11). The structure (1) of alnusiin in which a monolactonized tergalloyl group, a rare component unit, bonds to the glucose residue, was elucidated based on spectral analyses including ^1H-^<13>C long-range shift correlation spectroscopy, and chemical methods. Another new hydrolyzable tannin with a related structure, bicornin (21), and six known galloylglucoses as well as six ellagitannins (including oligomers), were isolated from Trapa bicornis fruits and their structures were characterized.

収録刊行物

  • Chemical & pharmaceutical bulletin   [巻号一覧]

    Chemical & pharmaceutical bulletin 37(10), 2655-2660, 1989-10-25  [この号の目次]

    公益社団法人日本薬学会

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各種コード

  • NII論文ID(NAID)
    110003627299
  • NII書誌ID(NCID)
    AA00602100
  • 本文言語コード
    ENG
  • 資料種別
    雑誌論文
  • ISSN
    00092363
  • データ提供元
    CJP引用  NII-ELS 
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