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Paper | Regular issue | Vol 98, No. 7, 2019, pp.895-903
Published online, 6th June, 2019
DOI: 10.3987/COM-19-14072
Modified Dehydroellagitannins from Davidia involucrata Leaves

Akari Esumi, Hiroe Aoyama, Yuuki Shimozu, Shoko Taniguchi, and Tsutomu Hatano*

*Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Okayama 700-8530, Japan

Abstract

Davidia involucrata (Nyssaceae) is a naturally rare plant found in southern China. We isolated two previously undescribed ellagitannins, davicratinic acid B (5) and C (6), in addition to four known compounds, davicratinic acid A (1), helioscopinin B (2), granatin A (3), and pedunculagin (4). Spectral analyses revealed that compounds 5 and 6 are modified dehydroellagitannins with isomeric structures.