(3-beta,5-beta)-5,14-Dihydroxy-19-oxo-3-(1-oxobutoxy)card-20(22)-enolide 4-18-00-03131 (Beilstein Handbook Reference) 5-beta-CARD-20(22)-ENOLIDE, 5,14-DIHYDROXY-19-OXO-3-beta-(1-OXOBUTOXY)- 5-beta-Card-20(22)-enolide, 19-oxo-3-beta,5,14-trihydroxy-, 3-butyrate 63979-65-7 BRN 0066761 Card-20(22)-enolide, 5,14-dihydroxy-19-oxo-3-(1-oxobutoxy)-, (3-beta,5-beta)- Strophanthidin-3-n-butyrate k-Strophanthidin, n-butyl- n-Butyl-k-strophanthidin