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 Pyricular...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 16 beta-(4'-methyl-5'-O-beta-D-glucopyranosyl-pentanoyloxy)-pregn-5-en-3 beta-ol-20-one 3-O-alpha-L-rhamnopyranosyl-(1-->2)-[alpha-L-rhamnopyranosyl-(1-->4)-]-beta-D-glucopyranoside by chemical evidence and spectral analysis, especially by 2D-NMR techniques.展开更多
Seven compounds were isolated from the stem of Lonicera hypoglauca for the first time and identified as ziguglycoside(Ⅰ),macranthoidin A (Ⅱ),macranthoidin B (Ⅲ),scopoletin (Ⅳ),chlorogenic acid (Ⅴ),daucosterol (...Seven compounds were isolated from the stem of Lonicera hypoglauca for the first time and identified as ziguglycoside(Ⅰ),macranthoidin A (Ⅱ),macranthoidin B (Ⅲ),scopoletin (Ⅳ),chlorogenic acid (Ⅴ),daucosterol (Ⅵ),β-sitosterol(Ⅶ).展开更多
文摘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 16 beta-(4'-methyl-5'-O-beta-D-glucopyranosyl-pentanoyloxy)-pregn-5-en-3 beta-ol-20-one 3-O-alpha-L-rhamnopyranosyl-(1-->2)-[alpha-L-rhamnopyranosyl-(1-->4)-]-beta-D-glucopyranoside by chemical evidence and spectral analysis, especially by 2D-NMR techniques.
文摘Seven compounds were isolated from the stem of Lonicera hypoglauca for the first time and identified as ziguglycoside(Ⅰ),macranthoidin A (Ⅱ),macranthoidin B (Ⅲ),scopoletin (Ⅳ),chlorogenic acid (Ⅴ),daucosterol (Ⅵ),β-sitosterol(Ⅶ).