A new spirostane steroid glycoside from Dioscorea nipponica

Phytochemical study of the rhizomes of Dioscorea nipponica resulted in the isolation of nine spirostane and furostane steroidal glycosides, including a new spirostane glycoside ( 1 ). The structure elucidation was achieved by spectroscopic and chemical methods. Acknowledgement: The work was supported by NIH (NIH Prime award number 1P50AT006268–01) and FDA (Specific Cooperative Research Agreement Number U01 FD004246–01).