Phytochemistry p. 1041 - 1046 (1985)
Update date:2022-08-05
Topics:
Yoshida, Takashi
Maruyama, Yasuhiko
Memon, M.Usman
Shingu, Tetsuro
Okuda, Takuo
Three new ellagitannins, gemin D, E and F were isolated from the leaves of Geum japonicum. The structures of gemin D and F were established as 3-O-galloyl-4,6-O-[(S-hexahydroxydiphenoyl]-D-glucose and 6-O-caffeoyl-2,3-O-[(S-hexahydroxydiphenoyl]-D-glucose, respectively. Gemin E is a novel C-glucosidic ellagitanin having a dehydrohexahydroxydiphenoyl group in the molecule. Gemin D was also isolated from the flower buds of Camellia japonica.
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