[Study on steroidal saponins of Dioscorea septemloba thunb].
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).


CONCLUSIONS
Compound II and III were obtained from the rhizomes of Dioscorea septemloba Thunb for the first time.
Tan
Da-Wei
DW
Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing 100850, China.
Kang
Li-Ping
LP
Lü
Ning
N
Zhang
Jie
J
Ma
Bai-Ping
BP
D027742:Dioscorea / Q000737:chemistry*; D004144:Diosgenin / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D035281:Plant Tubers / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification*
D012503:Saponins; D013256:Steroids; C019357:dioscin; C459619:protodioscin; D004144:Diosgenin