Inorganic salts of 2,8-dicarboxy-4,6-dioxo-10-propyl-4H,6H-benzo(1,2-b:5,4-b')dipyran useful for the treatment of asthma and hay fever
US4239748A · kind A · utility
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3References
12Claims
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Assignee
Inventors
Key dates
| Filing date | Nov 27, 1978 |
| Grant date | Dec 16, 1980 |
| Priority date | — |
| Expiry date | Nov 27, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D493/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is described a salt of 2,8-dicarboxy-4,6-dioxo-10-propyl-4H,6H-benzo(1,2-b:5,4-b')dipyran with a pharmaceutically acceptable inorganic cation, the salt having a solubility of less than 3% w/w in water a 20.5.degree. C. There are also described processes for making the salts and pharmaceutical, e.g. anti-allergic, compositions containing them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.