Separation and structure determination of nicardipine photoproducts by LC-ESI-MS

Shih Ming Chen, Mau Chih Hsieh, Su Hui Chao, E-E Chang, Po Yu Wang, An-Bang Wu

研究成果: 雜誌貢獻文章同行評審

8 引文 斯高帕斯(Scopus)


A sample of 0.104 M nicardipine in methanol was photoirradiated with a Philips 400 W UV lamp for 3 h in a photochemical chamber. A total of four major photoproducts were found from the HPLC chromatogram. The same sample was used for taking LC-MS, while eight major photoproducts were observed and the structures elucidated by analyzing the CID patterns of their respective mass spectra. A reaction scheme of nicardipine is proposed that the photochemical reactions occur mainly via oxidation of 1,4-dihydropyridine moiety, following the stepwise photo-reduction of the m-nitro group and demethylation of the ester group at 5-position of the pyridine ring.
頁(從 - 到)1008-1012
期刊Biomedical Chromatography
出版狀態已發佈 - 9月 2008

ASJC Scopus subject areas

  • 分析化學
  • 生物化學
  • 臨床生物化學
  • 分子生物學
  • 藥物發現
  • 藥理


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