Provision of a stabilized crystal of 6-(3-chloro-2-fluorobenzyl)-1-[(S)-1-hydroxymethyl-2-methylpropyl]-7-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid (compound A). A crystal of compound A, which shows a particular X-ray powder diffraction pattern of a characteristic diffraction peaks at diffraction angles 2θ(°) as measured by X-ray powder diffractometry.
提供稳定的晶体化合物A,其
化学式为6-(3-
氯-2-
氟苯基)-1-[(S)-1-羟甲基-2-甲基丙基]-7-甲氧基-
4-氧代-1,4-二氢喹啉-3-羧酸。该晶体呈现出特定的X射线粉末衍射图案,其特征衍射峰在衍射角度2θ(°)处,通过X射线粉末衍射测量得出。