Polymorphs and co-crystals of roxadustat
US11168057B2 · kind B2 · utility
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4Claims
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Key dates
| Filing date | Aug 10, 2018 |
| Grant date | Nov 9, 2021 |
| Priority date | — |
| Expiry date | Aug 10, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07B2200/13
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides crystalline Roxadustat Form-γ, crystalline Roxadustat Form-δ, process for the preparation of crystalline Roxadustat Form-γ, crystalline Roxadustat Form-δ 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.