Permanently charged chiral 1,4-dihydropyridines: Molecular probes of L-type calcium channels. Synthesis and pharmacological characterization of methyl (omega-trimethylalkylammonium) 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylate iodide, calcium channel antagonists - Peri, R; Padmanabhan, S; Rutledge, A (J Med Chem, 2000)
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