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A highly specific and efficient LC-QTOF mass spectrometric method was developed for the separation and characterization of process related substances and the major degradation products in alogliptin benzoate and its tablets. The separation was performed on Phenomenex Gemini-NX C18 column (250mm×4.6mm, 5μm) using 0.2% formic acid-0.2% ammonium acetate in(More)
Cinnabar (α-HgS), has been formulated in Traditional Chinese Medicines (TCMs) for thousands of years. Since the total Hg content was accepted widely as the toxicity criteria, the safety alerts have been issued about the cinnabar containing TCMs for exceeding Hg limits. However, cinnabar is almost insoluble in water, the oral absorption is extremely low.(More)
This study aims at investigating the separation, identification and characterization of related substances in apremilast by LC-MS hyphenated techniques, as well as the synthesis optimization and the degradation pathways elucidation. Forced degradation studies were conducted under the ICH prescribed stress conditions. The chromatographic separation was(More)
The development of digital products is booming in recent years because of the mature of entire environment. Among them, digital music should be the spotlight with unexpectedly expending speed. However, most studies of electronic commerce still focus on the field of physical products, but missing the value of digital wave. The purpose here is to explore and(More)
Primary hepatocytes cultured in vitro are a powerful tool to study the functions of hepatocytes and to evaluate the metabolism and toxicity of new drugs. However, in vitro culture of hepatocytes has proven to be very difficult. Ordinary culture conditions lead to dedifferentiation of hepatocytes, resulting in rapid change in cell morphology and significant(More)
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