Tannins of Cornaceous Plants. I. Cornusiins A, B and C, Dimeric Monomeric and Trimeric Hydrolyzable Tannins from Cornus officinalis, and Orientation of Valoneoyl Group in Related Tannins

Tsutomu Hatano, Noboru Ogawa, Reiko Kira, Taeko Yasuhara, Takuo Okuda

Research output: Contribution to journalArticle

96 Citations (Scopus)

Abstract

Cornusiin A (1), cornusiin B (2) and cornusiin C (3), new dimeric, monomeric and trimeric hydrolyzable tannins, were isolated from the fruits of Cornus officinalis (Cornaceae). Their structures, including the orientation of the valoneoyl group in 1 and 3, were established on the basis of chemical and spectroscopic data. 2,3-Di-O-galloyl-D-glucose (7), l,2,3-tri-0-galloyl-/?-D-glucose, l,2,6-tri-0-galloyl-/f-D-glucose, l,2,3,6-tetra-0-gaIloyl-/?-D-glucose, gemin D (5), isoterchebin, tellimagrandin I (6) and tellimagrandin II were also isolated from the fruits. The orientation of the valoneoyl group in camptothin A (14) and that in camptothin B (15), which had been isolated from Camptotheca acuminata (Nyssaceae), were also determined based on that in 1.

Original languageEnglish
Pages (from-to)2083-2090
Number of pages8
JournalChemical and Pharmaceutical Bulletin
Volume37
Issue number8
DOIs
Publication statusPublished - Jan 1 1989

Keywords

  • Cornus officinalis Camptotheca acuminata tannin
  • cornusiin A cornusiin B: cornusiin C: oenothein C: camptothin A: camptothin B:
  • hydrolyzable tannin

ASJC Scopus subject areas

  • Chemistry(all)
  • Drug Discovery

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