Pharmaceutical compositions containing a 2-carboxy-4-oxo-4H,-10H-(2)benzopyrano-(4,3-g)-(1) benzopyran or a salt thereof and method of use
US3998962A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1975 |
| Grant date | Dec 21, 1976 |
| Priority date | — |
| Expiry date | Jun 16, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K31/352
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Pharmaceutical dosage unit compositions containing as an active ingredient a compound of the formula ##STR1## wherein R.sub.1 is hydrogen or lower alkyl, R.sub.2, R.sub.4 and R.sub.5, which may be identical to or different from each other, are each hydrogen, lower alkyl, hydroxyl, lower alkoxy, acyloxy, halogen, nitro or --SO.sub.3 H, and PA1 R.sub.3 and R.sub.6, which may be identical to or different from each other, are each hydrogen, lower alkyl, hydroxyl, lower alkoxy, acyloxy, halogen, nitro, --SO.sub.3 H, hydroxycarbonyl-methoxy, .beta.-hydroxy-ethoxy or .beta.-amino-ethoxy, Or a salt thereof; and a method of using the same as antiallergics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.