Form I of azelastine of formula (I), its preparation process which comprises the following steps: a) crystallizing azelastine from a solution of said compound in isobutylmethylketone; b) isolating the Form I of azelastine that appears in the prior step; and c) removing the organic solvent from the Form I of azelastine thus obtained, and its use as antihistamine.
化合物式(I)的阿什替林I型,其制备过程包括以下步骤:a)从异丁基甲酮溶液中结晶出阿什替林;b)分离出在前一步骤中出现的阿什替林I型;c)从所获得的阿什替林I型中去除有机溶剂,并将其用作抗
组胺剂。