Crystals of [8-chloro-3-(4-chlorobenzyl)-4-difluoromethoxy-2-ethylquinolin-5-yloxy]acetic acid L-lysine salt, i.e., a crystal A which has peaks at diffraction angles 2θ=6.0°, 10.0°, 10.7°, 12.1°, 18.4°, 19.2° and 20.1° in powder X-ray diffraction spectra and a crystal B which has peaks at diffraction angles 2θ=6.0°, 11.7°, 12.4°, 15.2°, 16.4°, 20.3° and 22.6° in powder X-ray diffraction spectra. These crystals are chemically stable and have excellent thermal stability and physical properties, and are therefore suitable as medicinal substances.
8-
氯-3-(4-
氯苄基)-4-二
氟甲氧基-
2-乙基喹啉-5-基氧基]
乙酸 L-赖氨酸盐,即 A 晶体的衍射角 2θ=6.0°、10.0°、10.7°、12.1°、18.4°、19.2° 和 20.1°、在粉末 X 射线衍射光谱中,衍射角 2θ=6.0°、10.0°、10.7°、12.1°、18.4°、19.2° 和 20.1°处有峰的晶体 A,以及在粉末 X 射线衍射光谱中,衍射角 2θ=6.0°、11.7°、12.4°、15.2°、16.4°、20.3° 和 22.6°处有峰的晶体 B。这些晶体
化学性质稳定,具有优异的热稳定性和物理性质,因此适合作为药用物质。