several dihydropyridine calcium channel antagonists [ ( - ) 202-791 , nifedipine , nitrendipine ; 1-5 microm ] , known to be active on l-type channels , caused only modest inhibition of k+ -induced increase in intracellular free ca2+ concentration : c .
C2945601
dihydropyridine calcium
C0028066
nifedipine