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Novel steroidal saponins from Dioscorea esculenta (Togedokoro)
Hyoung Jae Lee1, Bunta Watanabe2, Masaru Nakayasu1
1a Graduate School of Agricultural Science , Kobe University , Kobe , Japan.
Abstract:
Fifteen steroidal saponins 1-15, which include 4 furostanol glycosides 1-3 and 15, and 11 spirostanol glycosides 4-14, were isolated from the tubers and leaves of lesser yam (Dioscorea esculenta, Togedokoro). Their structures were identified by nuclear magnetic resonance and liquid chromatography mass spectroscopy. Four steroidal saponins 9, 11, 14, and 15 were found to be novel compounds.
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