Two new sesquiterpenoid trialcohol isomers named 1 beta, 4 alpha 11 alpha -trihydroxyeudesmane (1) and Yunnanensehedychetriol (2), were isolated from the fresh rhizomes of Hedychium Yunnanense gagnep. Their structures...Two new sesquiterpenoid trialcohol isomers named 1 beta, 4 alpha 11 alpha -trihydroxyeudesmane (1) and Yunnanensehedychetriol (2), were isolated from the fresh rhizomes of Hedychium Yunnanense gagnep. Their structures were elucidated by spectroscopic methods.展开更多
Two novel polyoxygenated pyrrolylpyridine and bipyrrole alkaloids, speranskilatine A 1, and speranberculatine A 2, have been isolated from Speranskia tuberculata. Their structures were elucidated by spectroscopic meth...Two novel polyoxygenated pyrrolylpyridine and bipyrrole alkaloids, speranskilatine A 1, and speranberculatine A 2, have been isolated from Speranskia tuberculata. Their structures were elucidated by spectroscopic methods including 2D NMR techniques and X-ray crystallographic analysis.展开更多
Two novel poly-oxygen bipyridine alkaloids, speranculatines A (1) and B (2) have been isolated from Speranskia tuberculata. Their structures were elucidated by spectroscopic methods including 2D NMR techniques and X-r...Two novel poly-oxygen bipyridine alkaloids, speranculatines A (1) and B (2) have been isolated from Speranskia tuberculata. Their structures were elucidated by spectroscopic methods including 2D NMR techniques and X-ray crystallographic analysis.展开更多
The complex [(C_6H_5)_2PCH_2CH_2P(C_6H_5)_2]Fe (NO)_2, was easily synthesized by the reaction of Fe (CO)_5, NaNO_2 and (C_6H_5)_2PCH_2CH_2P(C_6H_5)_2 (dppe) in methanol and determined by X—ray diffraction which denot...The complex [(C_6H_5)_2PCH_2CH_2P(C_6H_5)_2]Fe (NO)_2, was easily synthesized by the reaction of Fe (CO)_5, NaNO_2 and (C_6H_5)_2PCH_2CH_2P(C_6H_5)_2 (dppe) in methanol and determined by X—ray diffraction which denoted that the title complex has two crystallographically independent molecules in its asymmetric unit.展开更多
A new 30-nortriterpenoid glycopside, 3-O-a-L-arabinopyranosyl-30-norhederagenin 28-O-a-L-rhamnopyranosyl(1-->4)-beta -D-glucopyranosyl (1-->6)-beta -D-glucopyranoside 1, named sinofoside A was isolated from Sino...A new 30-nortriterpenoid glycopside, 3-O-a-L-arabinopyranosyl-30-norhederagenin 28-O-a-L-rhamnopyranosyl(1-->4)-beta -D-glucopyranosyl (1-->6)-beta -D-glucopyranoside 1, named sinofoside A was isolated from Sinofranchetia chinensis. Its structure was elucidadated by spectra FAB-MS, 2D-NMR including H-1-H-1 COSY, H-1-C-13 COSY, TOSCY, HMBC and NOESY techniques.展开更多
The effect of poly (ethylene oxide) (PEO) on the w/o microemulsion is studied. The addition of PEO induces a decrease of attractive interaction between droplets in reverse microemulsion. Due to the absence of interact...The effect of poly (ethylene oxide) (PEO) on the w/o microemulsion is studied. The addition of PEO induces a decrease of attractive interaction between droplets in reverse microemulsion. Due to the absence of interaction between cationic surfactant and neutral polymer, the polymer molecules are forced into the interior of water core, avoiding the interfacial region.展开更多
文摘A new phytoecdysteroid was isolated from the root of Rhaponticum uniflorum. Its structure has been shown to be 2, 3, 20, 22-diacetonide ajugasterone.
文摘Two new sesquiterpenoid trialcohol isomers named 1 beta, 4 alpha 11 alpha -trihydroxyeudesmane (1) and Yunnanensehedychetriol (2), were isolated from the fresh rhizomes of Hedychium Yunnanense gagnep. Their structures were elucidated by spectroscopic methods.
文摘Two novel polyoxygenated pyrrolylpyridine and bipyrrole alkaloids, speranskilatine A 1, and speranberculatine A 2, have been isolated from Speranskia tuberculata. Their structures were elucidated by spectroscopic methods including 2D NMR techniques and X-ray crystallographic analysis.
文摘Two novel poly-oxygen bipyridine alkaloids, speranculatines A (1) and B (2) have been isolated from Speranskia tuberculata. Their structures were elucidated by spectroscopic methods including 2D NMR techniques and X-ray crystallographic analysis.
文摘The complex [(C_6H_5)_2PCH_2CH_2P(C_6H_5)_2]Fe (NO)_2, was easily synthesized by the reaction of Fe (CO)_5, NaNO_2 and (C_6H_5)_2PCH_2CH_2P(C_6H_5)_2 (dppe) in methanol and determined by X—ray diffraction which denoted that the title complex has two crystallographically independent molecules in its asymmetric unit.
基金This work as supported by"Light of West China"project,sponsored by Chinese Academy of Sciences,Gansu Nature Sciences Foundation and the Science Foundation of Northwest Normal University P.R.China.
文摘A new 30-nortriterpenoid glycopside, 3-O-a-L-arabinopyranosyl-30-norhederagenin 28-O-a-L-rhamnopyranosyl(1-->4)-beta -D-glucopyranosyl (1-->6)-beta -D-glucopyranoside 1, named sinofoside A was isolated from Sinofranchetia chinensis. Its structure was elucidadated by spectra FAB-MS, 2D-NMR including H-1-H-1 COSY, H-1-C-13 COSY, TOSCY, HMBC and NOESY techniques.
文摘The effect of poly (ethylene oxide) (PEO) on the w/o microemulsion is studied. The addition of PEO induces a decrease of attractive interaction between droplets in reverse microemulsion. Due to the absence of interaction between cationic surfactant and neutral polymer, the polymer molecules are forced into the interior of water core, avoiding the interfacial region.
