4-18-00-03131 (Beilstein Handbook Reference) 5-beta-CARD-20(22)-ENOLIDE, 5,14-DIHYDROXY-19-OXO-3-beta-((1-OXOPENTYL)OXY)-, 5-beta-Card-20(22)-enolide, 5,14-dihydroxy-19-oxo-3-beta-((1-oxopentyl)oxy)-, (3-beta,5-beta)- 63979-72-6 BRN 0067865 k-Strophanthidin, n-valeryl- n-Valeryl-k-strophanthidin