[Research of steroidal saponins from the fresh rhizomes of Dioscorea zingiberensis].
OBJECTIVE
To study the steroidal saponins from the fresh rhizomes of Dioscorea zingiberensis and search for new bioactive compounds.


METHODS
The steroidal saponins were isolated by normal phase silica gel and RP-C18 column chromatography, their chemical structures were elucidated by MS and NMR methods.


RESULTS
One steroidal saponin was isolated from EtOH extract of the fresh rhizomes of D. zingiberensis and identified as 26-O-beta-D-glucopyranosyl-3beta, 22alpha, 26-trihydroxy-25(R)-furosta-5-en-3-O-[alpha-L-rhamnopyranosyl-(1 --> 4) ]-beta-D-glucopyranoside.


CONCLUSIONS
This compound is isolated from Dioscorea L. the first time.
Yang
Ru-Tong
RT
Institute of botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China. yangrt2000@126.com
Tong
Hai-Ying
HY
D002681:China; D002855:Chromatography, Thin Layer; D027742:Dioscorea / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D027343:Rhizome / Q000737:chemistry; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification*
D012503:Saponins; D013256:Steroids