abstract |
Certain 6-(substituted phenyl)-4,5-dihydro-3(2H)-pyridazinone compounds are disclosed having the general formula:n where R 1 , R 2 , R 3 and R 4 represent certain specified substituent groups. These compounds possess excellent platelet aggregation inhibiting activity and blood pressure depressing activity and are thus valuable as blood pressure depressant and antithrombotic agents. |