4-18-00-03134 (Beilstein Handbook Reference) 5-beta-CARD-20(22)-ENOLIDE, 5,14-DIHYDROXY-3-beta-(2-(3-METHYL-1-OXOBUTOXY)-1-OX 5-beta-Card-20(22)-enolide, 5,14-dihydroxy-3-beta-(2-(3-methyl-1-oxobutoxy)-1-oxopropoxy)-19-oxo- 63979-74-8 BRN 0072018 alpha-i-Valeryloxypropionyl-k-strophanthidin k-Strophanthidin, alpha-isovaleryloxypropionyl-