期刊
ORGANIC LETTERS
卷 16, 期 5, 页码 1378-1381出版社
AMER CHEMICAL SOC
DOI: 10.1021/ol500146a
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资金
- Japan Society for the Promotion of Science KAKENHI [25870532]
- Grants-in-Aid for Scientific Research [26460125, 25870532] Funding Source: KAKEN
Two unusual ellagitannin metabolites, quercusnins A (3) and B (4), have been isolated from the sapwood of Quercus crispula, and their structures determined by spectroscopic methods, as well as DFT calculations of H-1 and C-13 NMR chemical shifts of the possible four diastereomers. Treatment of the major ellagitannin species, vescalagin, with Shiitake mushroom (Lentinula edodes) gave 3, which indicated that these unique ellagitannins were the fungal metabolites of ellagitannins.
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