24211-64-1 4-18-00-03123 (Beilstein Handbook Reference) 5-alpha-Card-20(22)-enolide, 2-alpha,3-beta,14-trihydroxy-19-oxo- (8CI) BRN 0057795 Calotropagenin Card-20(22)-enolide, 2,3,14-trihydroxy-19-oxo-, (2-alpha,3-beta,5-alpha)- (9CI)