(S)-1-(4-Chloro-5-isoquinolinesulfonyl)-3-(methylamino)pyrrolidine monohydrochloride and a crystal thereof, and a crystal of the aforementioned monohydrochloride having a major peak or peaks at one or more positions selected from the group consisting of positions where 2θs are about 13.9°, 21.5°, 21.7°, 22.4°, 22.8°, 24.5° and 35.0° in a powder X-ray diffraction spectrum, which have excellent properties as active ingredient of a medicament for prophylactic and/or therapeutic treatment of glaucoma and the like.
(S)-1-(4-
氯-5-
异喹啉磺酰基)-3-(甲基
氨基)
吡咯烷单盐酸盐及其晶体,以及上述单盐酸盐的晶体在粉末X射线衍射光谱中2θ约为13.9°、21.5°、21.7°、22.4°、22.8°、24.5°和35.0°等一个或多个位置具有主峰,其作为药物活性成分具有优异的静脉和/或治疗青光眼等疾病的预防和/或治疗的性能。