Dr. Reddy's Laboratories Limited
Polymorphs and co-crystals of roxadustat

Abstract:

The present invention provides crystalline Roxadustat Form-.gamma., crystalline Roxadustat Form-.delta., process for the preparation of crystalline Roxadustat Form-.gamma., crystalline Roxadustat Form-.delta. and its pharmaceutical compositions thereof. The present invention also provides co-crystals of Roxadustat Form RLP, Roxadustat Form RNM and Roxadustat Form RU, process for their preparation and pharmaceutical composition thereof.