This oral, once-daily antihypertensive agent (FW = 505.57 g/mol; CAS 105979-17-7), also known by its code name KW-3049, trade name Coniel?, and systematic name O -methyl,O -[(3R)-1-(phenylmethyl)piperidin-3-yl] 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate, is a dihydropyridine-class calcium ion blocker that is effective against L-, N-, and T-channels, with potent and selective inhibitory action on cardiac slow calcium channels. Benidipine bound stereospecifically to nitrendipine binding sites of rat myocardium with high affinity (Ki = 0.13 nM) and to the rat brain a1-adrenergic receptor (Ki = 1.2 μM). KW-3049 exhibited no remarkable binding affinity to a2 adrenergic, b-adrenergic, D2 dopamine, H1 histamine, S2 serotonin, A1 adenosine, A2 adenosine and muscarinic cholinergic receptors at 100 μM.
