several novel cardiotonic vasodilators including bipyridines ( amrinone and milrinone ) , imidazolones ( enoximone and piroximone ) , dihydropyridazinones ( cl-914 , cl-930 and ly195115 ) and an imidazopyridine ( isomazole ) relaxed rat aortic strips contracted previously with 30 microm serotonin .
C0002697
amrinone
C0128513
milrinone