title: A new series of steroidal antidysrhythmic agents.
abstract: With the aim of finding an antidysrhythmic agent suitable for intravenous or oral administration we have examined a range of steroids carrying basic substituents. The primary screen involved control of cardiac dysrhythmias induced by intravenous infusion of aconitine into pentobarbitone-anaesthetised artificially-respired rats. The best activity was found among a series of 11 alpha-alkylamino steroids and structure-activity studies included modification of the alkylamino group and variation of substituents in ring A and at the 17-position. Good oral and intravenous activity was found among 17 beta-methoxycarbonyl-5 alpha-androstanes and methyl 2 beta-ethoxy-3 alpha-hydroxy-11 alpha-(3-methylbutylamino)-5 alpha-androstane-17 beta-carboxylate hydrochloride (CCI 22277) was selected for more detailed pharmacological study.
mesh_terms: D000157:Aconitine / Q000494:pharmacology; D000818:Animals; D000889:Anti-Arrhythmia Agents / Q000138:chemical synthesis / Q000627:therapeutic use*; D001145:Arrhythmias, Cardiac / Q000188:drug therapy*; D004305:Dose-Response Relationship, Drug; D004353:Drug Evaluation, Preclinical; D006321:Heart / Q000187:drug effects; D008297:Male; D051381:Rats; D013256:Steroids / Q000627:therapeutic use*; D013329:Structure-Activity Relationship
chemical_list: D000889:Anti-Arrhythmia Agents; D013256:Steroids; D000157:Aconitine