Tannins and Related Compounds. CXVII. Isolation and Characterization of Three New Ellagitannins, Lagerstannins A, B and C, Having a Gluconic Acid Core, from Lagerstroemia speciosa (L.) PERS

Abstract

Lagerstannins A (6), B (11) and C (8), ellagitannins having a gluconic acid core, have been isolated from the fruits and leaves of Lagerstroemia speciosa (L.) PERS. (=L. flos-reginae RETZ.)(Lythraceae). On the basis of chemical and spectroscopic evidence, their structures were established as 2,3;4,6-bis-O-(S)-hexahydroxydiphenoyl-D-gluconic acid (6), 2,3,5-O-(S, R)-flavogallonyl-4,6-O-(S)-hexahydroxydiphenoyl-D-gluconic acid (11), and 5-O-galloyl-4,6-O-(S)-hexahydroxydiphenoyl-D-gluconic acid (8), respectively. Furthermore, the structure of an ellagitannin, punigluconin, previously isolated from the bark of Punica granatum L., was revised as 2,5-di-O-galloyl-4,6-O-(S)-hexahydroxy-diphenoyl-D-gluconic acid (10), based on spectral re-examination.

Journal

Chemical & pharmaceutical bulletin   [List of Volumes]

Chemical & pharmaceutical bulletin 40(11), 2975-2980, 1992-11-25  [Table of Contents]

The Pharmaceutical Society of Japan

Cited by:  2

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Codes

  • NII Article ID (NAID) :
    110003629668
  • NII NACSIS-CAT ID (NCID) :
    AA00602100
  • Text Lang :
    ENG
  • Article Type :
    Journal Article
  • ISSN :
    00092363
  • Databases :
    CJPref  NII-ELS 

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