FURTHER-STUDIES ON GLYCOSIDES FROM THE LEAVES OF TETRAPANAX-PAPYRIFERUM

Papyrioside L-IIc, a glycoside from Tetrapanax papyriferum, was identified as 11α-hydroxy-3,21-dioxo-olean-12-en-28-oyl α-L-rhamnopyranosyl-(1 → 4)-β-D-glucopyranosyl-(1 → 6)-β-D-glucopyranoside (2). The previously described papyrioside L-IIa (1) is an artifact, produced from (2) during the extraction with methanol. The minor glycosides L-IIb and L-IId were assigned as 3α-hydroxy-11α-metnoxy-21-oxo-olean-12-en-28-oyl and 3α,11α-dihydroxy-21-oxo-olean-12-en-28-oyl α-L- rhamnopyranosyl-(1 → 4)-β-D-glucopyranosyl-(1 → 6)-β-D-glucopyranoside [(9) and (10) respectively] by a 13C n.m.r. analysis.