Synonyms: Atriopeptin-21(rat); 1,2-Dithia-5,8,11,14,17,20,23,26,29,32,35,38,41,44,47,50-hexadecaazacyclotripentacontane,cyclic peptide deriv.; Atrial natriuretic factor V; Atriopeptin I (rat);Atriopeptin V (rat); Atriopeptin-21 (rat reduced), cyclic (3®19)-disulfide; Rat atriopeptin I;Rat atriopeptin(103-123)