97743-92-5Relevant academic research and scientific papers
Gemins D, E and F, ellagitannins from Geum japonicum
Yoshida, Takashi,Maruyama, Yasuhiko,Memon, M.Usman,Shingu, Tetsuro,Okuda, Takuo
, p. 1041 - 1046 (1985)
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.
GEMIN B AND C, DIMERIC ELLAGITANNINS FROM GEUM JAPONICUM
Yoshida, Takashi,Maruyama, Yasuhiko,Okuda, Takuo,Memon, M. Usman,Shingu, Tetsuro
, p. 4245 - 4248 (2007/10/02)
Two new dimeric ellagitannins, gemin B (2) and C (3), and a monomeric tannin, gemin D (4), have been isolated from Geum japonicum.Their strictures were elucidated on the basis of NMR analysis and partial hydrolysis.Gemin D was isolated also from Camellia japonica.KEYWORDS - Geum japonicum; Rosaceae; gemin B; gemin C; gemin D; dimeric ellagitannin; Camellia japonica; Theaceae; 1H- and 13C-NMR; tannase
