Two New Oleanane-type Triterpenoids from Methanolyzed Saponins of Momordica cochinchinensis

Two new oleanane-type triterpenoid saponins (1 and 2) were isolated from the methanolyzed total saponins of the seeds of Momordica cochinchinensis (Lour.) Spreng, together with 16 known compounds (3-18). Their structures were elucidated on the basis of detailed spectroscopic, including 1D and 2D NMR, mass spectrometric, methanolysis and LC-MS analysis. All the isolates were tested for their cytotoxic activities against five human cancer cell lines (HL-60, SMMC-7721, PANC-1, A-549, and SW-480) and the glucose uptake activity. The known compound 6 exhibited toxic effects against HL-60 with an IC50 value of 18.1 mu M, while 10 showed cytotoxicity against SMMC-7721 and A-549 cell lines, with IC50 values of 34.4 and 32.8 mu M, respectively. In addition, the new compound 2 showed glucose uptake activity with a glucose consumption value of 0.29 mu M at 10 mu M concentration.