The present invention provides a crystal of a 1.5 D-tartrate of a compound represented by the formula (1) having an A production inhibitory effect, characterized in that the crystal has a diffraction peak at a diffraction angle (20.2) of 23.2 in powder X-ray diffractometry; a crystal of a disulfate of the compound of the formula (1), characterized in that the crystal has a diffraction peak at a diffraction angle (20.2) of 17.1 in powder X-ray diffractometry; various other salts of the compound of the formula (1); crystal polymorphs of these salts; and the like, which are expected to be used as drug substances.
本发明提供了一种具有A产生抑制作用的化合物的1.5
D-酒石酸晶体,其特征在于该晶体在粉末X射线衍射法中具有在衍射角(20.2)为23.2的衍射峰;一种化合物的二
硫酸盐的晶体,其特征在于该晶体在粉末X射线衍射法中具有在衍射角(20.2)为17.1的衍射峰;化合物的各种其他盐;这些盐的晶体多态形式;以及预期用作药物物质的类似物。