An NMR Study on Two Glucosylated Steroidal Saponins of Tb
皂苷Tb 2个糖基化产物的NMR研究

Two glucosylated steroidal saponins of Tb were elucidated as pennogenin-3-O-α-D-glucopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)]-β-D-glucopyranoside (1), and pennogenin-3-O-α-D-glucopyranosyl-(1→4)-α-D-glucopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)]-β-D-glucopyrannoside (2) by MS, 1H NMR, 13C NMR, COSY, HSQC and HMBC analysis. 1 and 2 are new compounds. The 13C and 1H NMR chemical shifts of these two new compounds were assigned.