title: Novel dihydropyridine calcium channel antagonists: structural features which extend duration of action.
mesh_terms: D000818:Animals; D002121:Calcium Channel Blockers / Q000494:pharmacology*; D004095:Dihydropyridines; D006168:Guinea Pigs; D066298:In Vitro Techniques; D011725:Pyridines / Q000494:pharmacology*; D013329:Structure-Activity Relationship
chemical_list: D002121:Calcium Channel Blockers; D004095:Dihydropyridines; D011725:Pyridines; C038806:1,4-dihydropyridine