Pyrano[f]quinoline derivatives and pharmaceutical compositions containing the same
US5093339A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1989 |
| Grant date | Mar 3, 1992 |
| Priority date | — |
| Expiry date | Aug 14, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P43/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Pyrano[f]quinoline derivatives of the formula (I): ##STR1## wherein R.sub.1 and R.sub.2 represent hydrogen, hydroxyl group or a group of the formula: ##STR2## wherein n represents an integer from 1 to 4, R.sub.3 and R.sub.4 represent hydrogen or a lower alkyl group, and the broken lines in the rings represent that the bond between the carbon atoms at the 1- and 2-positions and the bond between the carbon atoms at the 9- and 10-positions may be double bonds, and pharmaceutical compositions containing the derivatives. The derivatives and compositions are useful as anti-thrombotic agents, cerebral circulation improving agents, hypotensive agents, anti-angina agents, anti-asthmatic agents, anti-ulcer agents and anti-PAF agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.