A new spirostanol saponin from the rhizomes of Paris mairei

A new spirostanol steroidal saponin, named maireioside A (1), together with three known steroidal saponins, hypoglaucin G (2),arisaponin I (3), and diosgenin-3-O-α-L-rhamnopyranosyl (1→4)-[α-L-rhamnopyranosyl (1→2)]-β-D-glucopyranoside (4), were isolated from the rhizomes of Paris mairei. The structure elucidation was accomplished by 1D and 2D NMR methods, HR-ESI-MS,and hydrolysis.