A new coumarin glycoside was isolated from the ethanol extract of the barks of stem of Daphne giraldii Nitsche. Its structure was defined as daphnetin 8-O-β-D-glucopyranosyl-（1 → 6）-β-D-glucopyranoside on the bas...A new coumarin glycoside was isolated from the ethanol extract of the barks of stem of Daphne giraldii Nitsche. Its structure was defined as daphnetin 8-O-β-D-glucopyranosyl-（1 → 6）-β-D-glucopyranoside on the basis of spectral evidences.展开更多
Two new steroidal sapogenins（1,2） along with five known steroidal sapogenins were isolated from the acid hydrolysis product of the whole glycoside mixture of Welsh onion（Allium fistulosum L.） seeds.Based on compre...Two new steroidal sapogenins（1,2） along with five known steroidal sapogenins were isolated from the acid hydrolysis product of the whole glycoside mixture of Welsh onion（Allium fistulosum L.） seeds.Based on comprehensive spectroscopic analyses, including 2D NMR spectroscopy and mass spectrometry,their structures were elucidated as（25R）-19-norspirosta-l,3,5（10）-triene-4 -methyl-2-ol（1）,（25R）-spirost-l,4-diene-3-one-2,6-diol（2）,（25R）-spirost-l,4-diene-3-one-2-ol（3）,（25R）-spirost-4-ene-3-one-2-ol （4）,yuccagenin（5）,gitogenin（6） and tigogenin（7）.展开更多
文摘A new coumarin glycoside was isolated from the ethanol extract of the barks of stem of Daphne giraldii Nitsche. Its structure was defined as daphnetin 8-O-β-D-glucopyranosyl-（1 → 6）-β-D-glucopyranoside on the basis of spectral evidences.
基金supported by the National Natural Science Foundation of China(No30873154)National Specific Project of New Drugs Innovation(No2009ZX09103-328)Scientific Foundation of Shanghai China(No 08DZ1971600)
文摘Two new steroidal sapogenins（1,2） along with five known steroidal sapogenins were isolated from the acid hydrolysis product of the whole glycoside mixture of Welsh onion（Allium fistulosum L.） seeds.Based on comprehensive spectroscopic analyses, including 2D NMR spectroscopy and mass spectrometry,their structures were elucidated as（25R）-19-norspirosta-l,3,5（10）-triene-4 -methyl-2-ol（1）,（25R）-spirost-l,4-diene-3-one-2,6-diol（2）,（25R）-spirost-l,4-diene-3-one-2-ol（3）,（25R）-spirost-4-ene-3-one-2-ol （4）,yuccagenin（5）,gitogenin（6） and tigogenin（7）.
