33279-57-1 Card-20(22)-enolide, 3-[(O-.beta.-D-glucopyranosyl-(1.fwdarw.6)-O-.beta.-D-glucopyranosyl-(1.fwdarw.4)-2,6-dideoxy-3-O-methyl-.beta.-D-ribo-hexopyranosyl)oxy]-5,14-dihydroxy-19-oxo-, (3.beta.,5.beta.)- NSC7530 STROPHANTHOSIDE-K k-Strophanthoside