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Communication | Regular issue | Vol 55, No. 1, 2001, pp.29-32
Published online, 1st January, 1970
DOI: 10.3987/COM-00-9088
Tetrameric and Pentameric Ellagitannins from Monochaetum multiflorum

José H. Isaza M., Hideyuki Ito, and Takashi Yoshida*

*Faculty of Pharmaceutical Science, Okayama University, 1-1-1 Tsushima-naka, Okayama 700-8530, Japan

Abstract

Two new hydrolyzable tannins, nobotanin S (1) and melastoflorin A (2), were isolated from the leaves of Monochaetum multiflorum, and their structures were characterized as tetrameric and pentameric ellagitannins based on detailed NMR analyses using 2D-NMR techniques and chemical evidence. Melastoflorin A (pentamer) was notably the biggest molecule among numerous hydrolyzable tannins.