we have examined the effects on the activities of three calmodulin-dependent enzymes ( camp phosphodiesterase , caldesmon kinase and myosin light chain kinase ) of the dihydropyridine ca2+ channel blocker felodipine and three analogues ( p-chloro , oxidized and t-butyl ) exhibiting different pharmacological potencies .
C0012315
dihydropyridine
C0015772
felodipine