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Paper | Special issue | Vol 33, No. 2, 1992, pp.597-606
Published online, 1st January, 1970
DOI: 10.3987/COM-91-S49
Two New Ellagitannin Metabolites, Carpinusin and Carpinusin from Carpinus laxiflora

Gen-ichiro Nonaka,* Michiko Akazawa, and Itsuo Nishioka

*Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan


From the fresh leaves of Carpinus laxiflora (Betulaceae), two new hydrolyzable tannins, carpinusin (2) and carpinusnin (3), have been isolated, together with thirteen known hydrolyzable tannins and related compounds, and their structures were elucidated on the basis of physico-chemical evidence.