an affinity label analog of nifedipine and nitrendipine , 2,6-dimethyl-3,5-dicarbomethoxy-4- ( 2-isothiocyanatophenyl ) -1,4-dihydropyridine , was found to inhibit the calcium channel by a covalent interaction with a protein subunit ( mr = 45,000 ) of the calcium channel .
C0028127
nitrendipine
C0012315
dihydropyridine