Tannins and Related Polyphenols of Melastomataceous Plants. III. Nobotanins G, H and I, Dimeric Hydrolyzable Tannins from Heterocentron roseum

Takashi YOSHIDA; Kumiko HABA; Fumihisa NAKATA; Yoshiaki OKANO; Tetsuro SHINGU; Takuo OKUDA

doi:10.1248/cpb.40.66

吉田隆志, 羽場久美子, 中田文久, 岡野嘉明, 新宮徹朗, 奥田拓男

著者情報

キーワード: Heterocentron roseum, Melastomataceae, tannin, ellagitannin dimer, nobotanin G, nobotanin H, nobotanin I, depsidone, valoneoyl group

ジャーナルフリー

1992 年 40 巻 1 号 p. 66-71

DOI https://doi.org/10.1248/cpb.40.66

詳細

抄録

Three new hydrolyzable tannin dimers, nobotanins G (6), H (12) and I (13), have been isolated from the leaves of Heterocentron roseum (Melastomataceae), and their structures were elucidated on the basis of chemical degradations and nuclear magnetic resonance spectral analyses. Nobotanin I (13) is a novel dimer possessing a depsidone-forming valoneoyl group in the molecule. Five known tannins, casuarictin (1), strictinin (2), geraniin (3), and nobotanins B (4) and F (5), were also isolated.

責任著者(Corresponding author)

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