c41h64o13

digitoxin \dig`i*tox"in\ (d[i^]j`[i^]*t[o^]k"s[i^]n), n. (Chem.)
   A steroid glycoside, one of the cardiotonic chemical
   substances which is extracted from the foxglove. It is a
   white, crystalline substance ({C41H64O13}), and is a
   3-substituted triglucoside of a steroid, related structurally
   to digitalin and digoxin. It is used as a cardiotonic for
   treatment of certain heart conditions, such as congestive
   heart failure. Chemically it is

   (3[beta],5[beta])-3-[(O-2,6-Dideoxy-[beta]-D-ribo-hexopyranosyl-(1[rarr]4)-O-2,6-dideoxy-[beta]-D-ribo-hexopyranosyl-(1[rarr]4)-2,
   6-dideoxy-[beta]-D-ribo-hexopyranosyl)oxy]-14-hydroxy-card-20(22)-enolide.
   The related compounds {digitalin} and {digoxin} are also
   extracted from the foxglove ({Digitalis lanata} and
   {Digitalis purpurea}). The class of steroid glycosides having
   cardiotonic properties are refered to as the cardiac
   glycoside group. --MI11
   [PJC]