in contrast , chemically closely related dihydropyridines , pn200-110 ( ed50 = 0.33 +/- 0.15 nm ) and nitrendipine ( ed50 = 1.3 +/- 0.3 nm ) , which block calcium influx through the same voltage-gated channels , completely inhibited potassium-mediated neuronal survival .
C0012315
dihydropyridines
C0028127
nitrendipine