- Digitalis lanata
- digitalin dig"i*ta`lin, n. [Cf. F. digitaline.]
(a) (Medicine, Pharmacy) Any one of several extracts of
foxglove ({Digitalis}), as the ``French extract,'' the
``German extract,'' etc., which differ among
themselves in composition and properties. Both
{Digitalis lanata} and {Digitalis purpurea} have been
used to prepare such extracts.
(b) (Chem.) the distinctive chemical substance, a steroid
glycoside, which is the essential ingredient of the
extracts of foxglove. It is a white, crystalline
substance ({C36H56O14}), and is a 3-substituted
diglucoside of a steroid. It is a powerful cardiac
stimulant and is used as a cardiotonic for treatment
of certain heart conditions, such as congestive heart
failure. Chemically it is
(3[beta],5[beta],16[beta])-3-[6-Deoxy-4-O-[beta]-D-glucopyranosyl-3-O-methyl-[beta]-D-galactopyranosyl)oxy]-14,16-dihyroxy-card-20 (22)-enolide. The related compounds {digitoxin} and {digoxin} are also extracted from the foxglove. The class of steroid glycosides having cardiotonic properties are refered to as the cardiac glycosides. --MI11
Syn: digitalinum verum, Diginorgin, Schmiedeberg's digitalin, digitalis, digitalis glycoside. [1913 Webster +PJC]
The Collaborative International Dictionary of English. 2000.