<chemical> N-butyl-n-(2-(diethylamino)ethyl)-1-naphthamide. A proposed antiarrhythmic that prolongs myocardial refractory period and stabilises cell membranes. ... Pharmacological action: anti-arrhythmia agents. ... Chemical name: 1-Naphthalenecarboxamide, N-butyl-N-(2-(diethylamino)ethyl)- ... (12 Dec 1998) ...