Introduction Aconitine-type alkaloids isolated from the roots of Aconitum carmiechaeli show a potential toxicity and a broad spectrum of bioactivity[1-4].On the basis of the C8-substituent of C19-diterpenoid skeleton,...Introduction Aconitine-type alkaloids isolated from the roots of Aconitum carmiechaeli show a potential toxicity and a broad spectrum of bioactivity[1-4].On the basis of the C8-substituent of C19-diterpenoid skeleton,aconitine-type alkaloids can be divided into diester-diterpenoid alkaloids（DDAs）,monoester-diterpenoid alkaloids（MDAs）,and lipo-alkaloids（Fig.1）.展开更多
Hydrolysis procedure of N-phosphoryl phenylalanine (DIPP-Phe) was studied by HPLC-ESI-MS/MS. The results showed that (HO)(i-PrO)P(O)Phe was the main intermediate and the hydrolysis of DIPP-Phe also occurred through a ...Hydrolysis procedure of N-phosphoryl phenylalanine (DIPP-Phe) was studied by HPLC-ESI-MS/MS. The results showed that (HO)(i-PrO)P(O)Phe was the main intermediate and the hydrolysis of DIPP-Phe also occurred through a penta-coordinate transition state.展开更多
目的:鉴定人体内盐酸西替利嗪的代谢产物。方法:本试验采用高效液相色谱-电喷雾离子阱质谱(ESI/MSn,electro-spray ion trap mass spectrometry)联用技术对2名中国健康志愿受试者口服20mg盐酸西替利嗪胶囊后尿中代谢物进行了初步鉴定。...目的:鉴定人体内盐酸西替利嗪的代谢产物。方法:本试验采用高效液相色谱-电喷雾离子阱质谱(ESI/MSn,electro-spray ion trap mass spectrometry)联用技术对2名中国健康志愿受试者口服20mg盐酸西替利嗪胶囊后尿中代谢物进行了初步鉴定。尿样经液-液萃取和C18固相萃取小柱处理后,先用HPLC色谱法将主要代谢物分离,然后将其导入ESI离子源,选择可能代谢物的质荷比进行选择离子扫描(selected ion monitoring,SI M),确定存在的代谢物,再对各自的母离子分别进行全扫描二级(full scan MS2)质谱分析,以其生成的离子来鉴定主要代谢物。结果:未发现除原形药外存在其他可能的代谢物。结论:西替利嗪自人体内经肾脏主要以原形排泄。展开更多
This work aims to elucidate the chemical constituents of Kai-Xin-San（KXS） and its metabolites in rat plasma.KXS extracts were separated on an Agilent HPLC SB-C 18 column,analyzed by ion-trap tandem mass spectrometry...This work aims to elucidate the chemical constituents of Kai-Xin-San（KXS） and its metabolites in rat plasma.KXS extracts were separated on an Agilent HPLC SB-C 18 column,analyzed by ion-trap tandem mass spectrometry and high-accuracy qTOF mass spectrometry in negative ion mode.A total of 39 compounds,including 11 ginsenosides,14 Polygala saponins,5 sucrose esters,8 oligosaccharide esters and 1 xanthone were characterized from KXS.Fifteen of them were confirmed by reference standards.No constituents were detected from Poria or Acori Tatarinowii Rhizoma.After oral administration of KXS（7 g/kg）,10 ginsenosides and 18 Polygala compounds were detected in rat plasma.This study indicates that ginseng saponins,Polygala saponins and saccharide esters could be the major effective components of KXS prescription.展开更多
基金Supported by the National Natural Science Foundation of China(Nos.30472134and30672600)the National Basic Re-search Program of China(No.2006CB5047060).
文摘Introduction Aconitine-type alkaloids isolated from the roots of Aconitum carmiechaeli show a potential toxicity and a broad spectrum of bioactivity[1-4].On the basis of the C8-substituent of C19-diterpenoid skeleton,aconitine-type alkaloids can be divided into diester-diterpenoid alkaloids（DDAs）,monoester-diterpenoid alkaloids（MDAs）,and lipo-alkaloids（Fig.1）.
文摘Hydrolysis procedure of N-phosphoryl phenylalanine (DIPP-Phe) was studied by HPLC-ESI-MS/MS. The results showed that (HO)(i-PrO)P(O)Phe was the main intermediate and the hydrolysis of DIPP-Phe also occurred through a penta-coordinate transition state.
文摘目的:鉴定人体内盐酸西替利嗪的代谢产物。方法:本试验采用高效液相色谱-电喷雾离子阱质谱(ESI/MSn,electro-spray ion trap mass spectrometry)联用技术对2名中国健康志愿受试者口服20mg盐酸西替利嗪胶囊后尿中代谢物进行了初步鉴定。尿样经液-液萃取和C18固相萃取小柱处理后,先用HPLC色谱法将主要代谢物分离,然后将其导入ESI离子源,选择可能代谢物的质荷比进行选择离子扫描(selected ion monitoring,SI M),确定存在的代谢物,再对各自的母离子分别进行全扫描二级(full scan MS2)质谱分析,以其生成的离子来鉴定主要代谢物。结果:未发现除原形药外存在其他可能的代谢物。结论:西替利嗪自人体内经肾脏主要以原形排泄。
基金National Science & Technology Mega Project forPrimary Drug Innovation from Ministry of Science and Technologyof China (Grant No. 2009ZX09502-006)
文摘This work aims to elucidate the chemical constituents of Kai-Xin-San（KXS） and its metabolites in rat plasma.KXS extracts were separated on an Agilent HPLC SB-C 18 column,analyzed by ion-trap tandem mass spectrometry and high-accuracy qTOF mass spectrometry in negative ion mode.A total of 39 compounds,including 11 ginsenosides,14 Polygala saponins,5 sucrose esters,8 oligosaccharide esters and 1 xanthone were characterized from KXS.Fifteen of them were confirmed by reference standards.No constituents were detected from Poria or Acori Tatarinowii Rhizoma.After oral administration of KXS（7 g/kg）,10 ginsenosides and 18 Polygala compounds were detected in rat plasma.This study indicates that ginseng saponins,Polygala saponins and saccharide esters could be the major effective components of KXS prescription.
