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Structure elucidation of three triterpenoid saponins from Alphitonia zizyphoides using 2D NMR techniques.

High-field nmr experiments have been used to determine the structures of three new saponins, zizyphoisides C, D, and E [1-3], isolated from Alphitonia zizyphoides, a medicinal plant found in the Samoan rain forest. The saponins consist of the aglycone, jujubogenin, to which are attached three sugar units and an unsaturated side-chain. The three compounds are similar except for the location of an acetyl group on one of the sugar units.[1]

References

  1. Structure elucidation of three triterpenoid saponins from Alphitonia zizyphoides using 2D NMR techniques. Li, D., Owen, N.L., Perera, P., Andersson, C., Bohlin, L., Cox, P.A., Pugmire, R.J., Mayne, C.L., Grant, D.M. J. Nat. Prod. (1994) [Pubmed]
 
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