3-beta,14-Dihydroxy-5-beta-card-20(22)-enolide 3-ester with D-2-aminobutyric acid 5-beta-CARD-20(22)-ENOLIDE, 3-beta,14-DIHYDROXY-, 3-(2-AMINOBUTYRATE) (ester), D 5-beta-Card-20(22)-enolide, 3-beta,14-dihydroxy-, 3-(2-aminobutyrate) (ester), D- 81072-19-7 Digitoxigenin-3-beta-(3-methyl-D-alanyl) ester