abstract |
The present invention relates to a process for the preparation of 5 - [(1R) -2 - ({2- [4- (2,2-difluoro-2- phenylethoxy) phenyl] ethyl} amino) -8-hydroxyquinolin-2 (1H) -one, and (ii) a pharmaceutically acceptable crystalline addition salt of a dicarboxylic acid, a sulfonic acid or a sulfimide, or a pharmaceutically acceptable solvate thereof . |