A new flavonoid glycoside, 5, 7-dihydroxy-4'-methoxyflavonoid 7-Q-[6-O-(4-O-acetyl-alpha-L-rhamnosyl)-3-O-beta-D-glucosyl]-6-O-acetyl-beta-D-glucoside was isolated from Thalictrum przewalskii. Its structure was de...A new flavonoid glycoside, 5, 7-dihydroxy-4'-methoxyflavonoid 7-Q-[6-O-(4-O-acetyl-alpha-L-rhamnosyl)-3-O-beta-D-glucosyl]-6-O-acetyl-beta-D-glucoside was isolated from Thalictrum przewalskii. Its structure was determined on basis of spectroscopic evidences.展开更多
One new prenylated flavonol, 7,8-(2'',2'' -dimethylpyrano)-5,3',4'-trihydroxy-3-methoxyflavone was isolated from Hypericum japonicum. The chemical structure was determined by spectroscopic meth...One new prenylated flavonol, 7,8-(2'',2'' -dimethylpyrano)-5,3',4'-trihydroxy-3-methoxyflavone was isolated from Hypericum japonicum. The chemical structure was determined by spectroscopic methods.展开更多
Two new phloroglucinol glycosides, 2,6-dihydroxy-3,5-dimethyl-1-isobutyrylbenzene-4-O-beta-D-glucoside and 2,6-dihydroxy-3,5-dimethyl-1-(2-methylbutyryl) benzene-4-O-beta-D-glucoside were isolated from Hypericum japon...Two new phloroglucinol glycosides, 2,6-dihydroxy-3,5-dimethyl-1-isobutyrylbenzene-4-O-beta-D-glucoside and 2,6-dihydroxy-3,5-dimethyl-1-(2-methylbutyryl) benzene-4-O-beta-D-glucoside were isolated from Hypericum japonicum. Their structures were determined by spectroscopic and chemical methods.展开更多
Two new alkaloids named piperlactam S, piperine S were isolated from Piper puberulum (Benth.)Maxim.The structues were elucidated by the spetral data including 1H-1H COSY, 14H-(13)C COSY, long-range 1H-(13)C COSY and...Two new alkaloids named piperlactam S, piperine S were isolated from Piper puberulum (Benth.)Maxim.The structues were elucidated by the spetral data including 1H-1H COSY, 14H-(13)C COSY, long-range 1H-(13)C COSY and NOE.展开更多
文摘A new flavonoid glycoside, 5, 7-dihydroxy-4'-methoxyflavonoid 7-Q-[6-O-(4-O-acetyl-alpha-L-rhamnosyl)-3-O-beta-D-glucosyl]-6-O-acetyl-beta-D-glucoside was isolated from Thalictrum przewalskii. Its structure was determined on basis of spectroscopic evidences.
文摘One new prenylated flavonol, 7,8-(2'',2'' -dimethylpyrano)-5,3',4'-trihydroxy-3-methoxyflavone was isolated from Hypericum japonicum. The chemical structure was determined by spectroscopic methods.
文摘Two new phloroglucinol glycosides, 2,6-dihydroxy-3,5-dimethyl-1-isobutyrylbenzene-4-O-beta-D-glucoside and 2,6-dihydroxy-3,5-dimethyl-1-(2-methylbutyryl) benzene-4-O-beta-D-glucoside were isolated from Hypericum japonicum. Their structures were determined by spectroscopic and chemical methods.
文摘Two new alkaloids named piperlactam S, piperine S were isolated from Piper puberulum (Benth.)Maxim.The structues were elucidated by the spetral data including 1H-1H COSY, 14H-(13)C COSY, long-range 1H-(13)C COSY and NOE.
