To provide a novel method for producing a composition comprising solifenacin or a salt thereof, and a composition comprising solifenacin or a salt thereof as produced by the method, wherein an optionally substituted lower alkyl is added to the 2-position of the quinuclidine of solifenacin. The composition of the present invention contains a highly pure solifenacin, while the unexpected compounds specific to the method in an extremely low content, so that it has very preferable properties as a bulk for pharmaceutical products.
提供一种生产含有索利那汀或其盐的组合物的新方法,以及由该方法生产的含有索利那汀或其盐的组合物,其中在索利那汀的
喹啉环的2位加入一个可选的取代较低的烷基。本发明的组合物含有高度纯净的索利那汀,同时非常低的意外化合物含量,因此作为药品产品原料非常有优越性能。