Tetrahedron p. 11853 - 11864 (1994)
Update date:2022-08-23
Topics:
Jia, Zhonghua
Koike, Kazuo
Nikaido, Tamotsu
Ohmoto, Taichi
Two novel triterpenoid pentasaccharides, ardisicrenosides E and F, were isolated from the roots of Ardisia crenata. They are the first examples of a triterpenoid glycoside hybridized with a glycosyl glycerol. Their structures were mainly established on the basis of high field NMR studies. In addition, molecular mechanics and dynamics calculation studies showed that the lack of 13C glycosylation shifts in the Rhamα1 →2G'Icβ and G'lcβ1→4Araα fragments in ardisicrenoside E could be correlated with the distortion of the corresponding torsion angles. Both compounds exhibited moderate inhibitory activity on cAMP phosphodiesterase.
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