SAPONINS FROM CROSSOPTERYX-FEBRIFUGA

Two bisdesmosidic saponins from the roots of Crossopteryx febrifuga were isolated by means of reversed phase HPLC. They were characterized on the basis of chemical and spectral data as 3-O-β-d-glucopyranosyl-2β,3β,6β,16α,23-pentahy droxyolean-12-en-28-oic acid 28-O-[α-l-rhamnopyranosyl(1→3)] [β-d-xylopyranosyl-(1→4)] [α-l-rhamnopyranosyl(1→2)]α-l-arabinopyranoside and 3-O-[β-d-apiofuranosyl(1→3)]β-d-glucopyrano-syl-2β,3 β,6β,16α,23-pentahydroxyolean-12-en-28-oic acid 28-O-[α-l-rhamnopyranosyl(1→3)] [β-d-xylopyranosyl-(1→4] [α-l-rhamnopyranosyl(1→2)]α-l-arabinopyranoside. 2D NMR experiments were useful in providing complete information on the structure and geometry of the new sapogenin present. © 1990.