Crystal forms of oxypyridine amide derivative and preparation method therefor
US11225462B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Jul 1, 2019 |
| Grant date | Jan 18, 2022 |
| Priority date | — |
| Expiry date | Jul 1, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07B2200/13
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to crystal forms of an oxypyridine amide derivative and a preparation method therefor. In particular, the present invention relates to crystal forms A, B, C, D, E and F of a compound represented by formula (I) and a preparation method therefor. The crystal forms of the compound represented by formula (I) as described in the present invention have good crystal form stability and may be better for clinical use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.