The invention provides crystals of dihydrochloride monohydrate of the compound of the following formula having an Aβ production inhibiting effect which crystals are characterized by exhibiting a diffraction peak at an angle of diffraction (2θ±0.2°) of 10.9° in powder X-ray diffractometry. Further, the invention also provides the compound in the form of various salts, crystal forms and amorphous forms which are suitable for the development of drugs.
本发明提供了一种具有Aβ产生抑制作用的以下化合物的二
盐酸一
水合物晶体,该晶体的特征是在粉末X射线衍射测定中,以(2θ±0.2°)为衍射角度,出现10.9°的衍射峰。此外,本发明还提供了适用于药物开发的各种盐类、晶体形式和非晶态形式的该化合物。