Five new steroidal saponins from the seeds of Solanum melongena L.

Two novel cholestane-type steroidal saponins , melongoside R-S ( 1 - 2 ) and three novel furostanol-type steroidal saponins , melongoside T-V ( 3 - 5 ), together with three known steroidal saponins ( 6 - 8 ) were isolated from the seeds of Solanum melongna L. The structures of these compounds were elucidated by extensive spectroscopic analysis such as HR-ESI-MS, ESI-MS and NMR.