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Authors: Lehr, GJ Barry, TL Petzinger, G Hanna, GM Zito, SW

Citation: Gj. Lehr et al., Isolation and identification of process impurities in trimethoprim drug substance by high-performance liquid chromatography, atmospheric pressure chemical ionization liquid chromatography mass spectrometry and nuclear magnetic resonance spectroscopy, J PHARM B, 19(3-4), 1999, pp. 373-389