STABLE CRYSTAL OF 4-OXOQUINOLINE COMPOUND
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United States of America
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Mar 20, 2025
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Apr 12, 2024
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Apr 12, 2024
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Abstract
The present invention provides a crystal of 6-(3-chloro-2-fluorobenzyl)-1-[(S)-1-hydroxymethyl-2-methylpropyl]-7-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid, which shows a particular powder X-ray diffraction pattern of a characteristic diffraction peaks at diffraction angles 2θ(°) as measured by powder X-ray diffractometry. The crystal of the present invention is superior in physical and chemical stability.
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