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.
Li
D
D
Department of Chemistry, Brigham Young University, Provo, Utah 84602.
Owen
N L
NL
Perera
P
P
Andersson
C
C
Bohlin
L
L
Cox
P A
PA
Pugmire
R J
RJ
Mayne
C L
CL
Grant
D M
DM
D002240:Carbohydrate Sequence; D014905:Independent State of Samoa; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008969:Molecular Sequence Data; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry*
D012503:Saponins; D014315:Triterpenes; C087102:zizyphoiside C; C087103:zizyphoiside D; C087104:zizyphoiside E