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[Study on steroidal saponins of Dioscorea septemloba thunb]
Da-Wei Tan1, Li-Ping Kang, Ning Lü
1Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing 100850, China.
Objective:
To isolate and identify steroidal saponins from the rhizomes of Dioscorea septemloba Thunb.
Methods:
The compounds were isolated by solvent extraction, column chromatography on silica gel and ODS, and their structures were elucidated on the base of chemical and spectral analyses.
Results:
Three steroidal saponins were isolated from the rhizomes of Dioscorea septemloba Thunb, and their structures were detemined as dioscin (I), protodioscin (II), protogracillin (III).
Conclusion:
Compound II and III were obtained from the rhizomes of Dioscorea septemloba Thunb for the first time.
