following the subdivision of calcium entry blockers as proposed by spedding ( 1985 ) , we have studied nifedipine ( dihydropyridine ) ( group i ) , verapamil ( phenylalkylamine ) and diltiazem ( benzothiazepine ) ( group ii ) , flunarizine and lidoflazine ( both diphenylalkylamines ) as well as bepridil ( group iii ) .
C0028066
nifedipine
C0012315
dihydropyridine