two major classes of drugs are considered , those that stimulate cell membrane adenylcyclase , i.e . beta-agonists ( dopamine , dobutamine and dopexamine ) and alpha-agonists ( glucagon , forskolin , calcium agonists ) and those that inhibit the cellular phosphodiesterases , i.e . bipyridine derivatives ( amrinone and milrinone ) and imidazolone derivatives ( fenoximone and piroximone ) .
C0002697
amrinone
C0128513
milrinone