Benzopyran-2-carboxylic acids in the prevention of asthmatic symptoms
US3952104A · kind A · utility
4Cited by
6References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1973 |
| Grant date | Apr 20, 1976 |
| Priority date | — |
| Expiry date | Jul 26, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There are described certain mono-chromone-2-carboxylic acids of formula, ##SPC1## Having one substituent in the 5 or 6 position or having 2 or more substituents in the 5,6,7 or 8 positions. There are also described processes for making the compounds and pharmacetuical compositions, for the treatment of asthma, containing the compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.