A series of twelve 1, 4-dihydropyridine derivatives incorporating an a-adrenergic moiety in one of the ester chains was synthesized. The compounds were evaluated for their calcium antagonist activities by the inhibition of [3H] nitrendipine binding and, in vitro, on pig coronary artery. Their al-and a,-adrenolytic effects were assessed from their inhibition of [3H] prazosin and [3H] yohimbine binding and, in vitro, on rat aorta and guinea pig vas ...