TY - JOUR
T1 - Constituents of Geranium thunbergii Sieb. et Zucc. Part 14. Structures of didehydrogeraniin, furosinin, and furosin
AU - Yazaki, Kazufumi
AU - Hatano, Tsutomu
AU - Okuda, Takuo
PY - 1989
Y1 - 1989
N2 - Three novel tannins, dehydrogeraniin, furosinin, and furosin, members of the dehydroellagitannins, were isolated from the aerial part of Geranium thunbergii Sieb. et Zucc., and their structures were elucidated on the basis of spectral evidence and chemical reactions. Dehydrogeraniin and furosinin were found to form equilibrium mixtures composed of four and eight tautomers, respectively, due to the equilibration of two dehydrohexahydroxydiphenoyl groups and the anomerization of the glucose moiety in the latter compound.
AB - Three novel tannins, dehydrogeraniin, furosinin, and furosin, members of the dehydroellagitannins, were isolated from the aerial part of Geranium thunbergii Sieb. et Zucc., and their structures were elucidated on the basis of spectral evidence and chemical reactions. Dehydrogeraniin and furosinin were found to form equilibrium mixtures composed of four and eight tautomers, respectively, due to the equilibration of two dehydrohexahydroxydiphenoyl groups and the anomerization of the glucose moiety in the latter compound.
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U2 - 10.1039/p19890002289
DO - 10.1039/p19890002289
M3 - Article
AN - SCOPUS:37049072055
SN - 1472-7781
SP - 2289
EP - 2296
JO - Journal of the Chemical Society, Perkin Transactions 1
JF - Journal of the Chemical Society, Perkin Transactions 1
IS - 12
ER -