TRITERPENOID SAPONINS FROM LEAVES OF PITTOSPORUM UNDULATUM

Article abstract of DOI:10.1016/0031-9422(83)80166-6

Two triterpenoid saponins obtained from the leaves of Pittosporum undulatum were characterized on the basis of chemical and spectral evidence as a mixture of 22-O-(2-methylbutyloyl)- and 22-O-(3,3-dimethylacryloyl)-A₁-barrigenol 3-O-β-D-glucopyranosyl-(1 -> 2)-<<β-D-galactopyranosyl-(1 -> 3)>-β-D-glucopyranosiduronic acid and 3-O-β-D-glucopyranosyl-(1 -> 2)-<α-L-arabinopyranosyl-(1 -> 3)-<α-L-arabinofuranosyl-(1 -> 4)>>-β-D-glucopyranosiduronic acid.The sugar moieties are the novel oligosaccharides found in A₁-barrigenol glycosides.Key Word Index - Pittosporum undulatum; Pittosporaceae; triterpenoid saponin; deacylsaponin; A₁-barrigenol 3-O-glycosides.