title: Importance of nitrile substitution for the Ca antagonistic action.
mesh_terms: D000818:Animals; D002121:Calcium Channel Blockers; D002415:Cats; D066298:In Vitro Techniques; D009570:Nitriles / Q000494:pharmacology; D014700:Verapamil / Q000031:analogs & derivatives* / Q000494:pharmacology
chemical_list: D002121:Calcium Channel Blockers; D009570:Nitriles; D014700:Verapamil