4-18-00-03131 (Beilstein Handbook Reference) 5-beta-CARD-20(22)-ENOLIDE, 5,14-DIHYDROXY-3-beta-(3-METHYL-1-OXOBUTOXY)-19-OXO- 5-beta-Card-20(22)-enolide, 5,14-dihydroxy-3-beta-(3-methyl-1-oxobutoxy)-19-oxo-, (3-beta,5-beta)- 63979-73-7 BRN 0067858 i-Valeryl-k-strophanthidin k-Strophanthidin, isovaleryl-