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- W2000904382 abstract "Abstract Five trace impurities were detected in the bulk drug citalopram using high‐performance liquid chromatography with UV detection. A simple and sensitive method suitable for liquid chromatography tandem multistage mass spectrometry (HPLC/MS n ) analysis was developed. Using this method, the fragmentation behavior of citalopram and the impurities was investigated. Four impurities were rapidly characterized, and an unknown impurity was elucidated as 3‐(3‐dimethylaminopropyl)‐ N ‐(1‐(3‐dimethylaminopropyl)‐1‐(4‐fluorophenyl)‐1,3‐dihydroisobenzofuran‐5‐yl)‐3‐(4‐fluorophenyl)‐1,3‐dihydroisobenzofuran‐5‐carboxamide on the basis of the MS n and exact mass evidence, and the proposed structure was further confirmed by nuclear magnetic resonance (NMR) experiments after preparative isolation. Copyright © 2007 John Wiley & Sons, Ltd." @default.
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- W2000904382 date "2007-07-31" @default.
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- W2000904382 title "Characterization of the trace-level impurities in the bulk drug citalopram by high-performance liquid chromatography/tandem multistage mass spectrometry" @default.
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- W2000904382 doi "https://doi.org/10.1002/rcm.3163" @default.
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