引用本文:
Ke HU, Ai Jun DONG, Hisayoshi KOBAYASHI, Shigeo IWASAKI, Xin Sheng YAO. A New Pregnane Glycoside from Dioscorea collettii var. hypoglauca[J]. Chinese Chemical Letters,
1998, 9(8): 739-742.
Citation: Ke HU, Ai Jun DONG, Hisayoshi KOBAYASHI, Shigeo IWASAKI, Xin Sheng YAO. A New Pregnane Glycoside from Dioscorea collettii var. hypoglauca[J]. Chinese Chemical Letters, 1998, 9(8): 739-742.
Citation: Ke HU, Ai Jun DONG, Hisayoshi KOBAYASHI, Shigeo IWASAKI, Xin Sheng YAO. A New Pregnane Glycoside from Dioscorea collettii var. hypoglauca[J]. Chinese Chemical Letters, 1998, 9(8): 739-742.
A New Pregnane Glycoside from Dioscorea collettii var. hypoglauca
摘要:
A new pregnane glycoside hypoglaucin G was isolated from Dioscorea collettii var. hypoglauca by bioactivity-guided fractionation, which showed a moderate activity of inducing morphological deformation of the Pyricularia oryzae mycelia. The structure of hypoglaucin G was established as 16β-(4'-methyl-5'-0-β-D-glucopyranosyl-pentanoyloxy)-pregn-5-en-3β-ol-20-one-3-0-α-L-rhamnopyranosyl-(1→2)-[α-L-rhamnopyranosyl-(1→4)-]-β-D-glucopyranoside by che- mical evidence and spectral analysis, especially by 2D-NMR techniques.
English
A New Pregnane Glycoside from Dioscorea collettii var. hypoglauca
Abstract:
A new pregnane glycoside hypoglaucin G was isolated from Dioscorea collettii var. hypoglauca by bioactivity-guided fractionation, which showed a moderate activity of inducing morphological deformation of the Pyricularia oryzae mycelia. The structure of hypoglaucin G was established as 16β-(4'-methyl-5'-0-β-D-glucopyranosyl-pentanoyloxy)-pregn-5-en-3β-ol-20-one-3-0-α-L-rhamnopyranosyl-(1→2)-[α-L-rhamnopyranosyl-(1→4)-]-β-D-glucopyranoside by che- mical evidence and spectral analysis, especially by 2D-NMR techniques.
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