Phytochemistry p. 2599 - 2604 (1986)
Update date:2022-08-17
Topics:
Nishimura, Hiroaki
Nonaka, Gen-Ichiro
Nishioka, Itsuo
Key Word Index - Quercus stenophylla; Fagaceae; scyllo-quercitol; gallotannin; ellagitannin; gallic acid; hexahydroxydiphenic acid.A series of gallotannins and ellagitannins based on a scyllo-quercitol core have been isolated from the bark of Quercus stenophylla.On the basis of chemical and spectroscopic evidence, the structures of the gallotannins have been established as 2-O-, 1,2-di-O-, 1,2,3-tri-O-, 1,2,3,4-tetra-O- and 1,2,3,4,5-penta-O-galloyl-scyllo-quercitols, and the ellagitannins as 1,5-di-O-galloyl-2,3-(S)-hexahydroxydiphenoyl-scyllo-quercitol and 1,4-(or 4,5)-di-O-galloyl-2,3-(S)-hexahydroxydiphenoyl-scyllo-quercitol.
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