(R)-Nicardipine is the less active R enantiomer of Nicardipine. Nicardipine is a blocker of calcium channel(IC50 of 1 μM for blocking cardiac calcium channels).
(S)-Nicardipine is the less active S enantiomer of Nicardipine. Nicardipine is a blocker of calcium channel(IC50 of 1 μM for blocking cardiac calcium channels).