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A cardiotonic agent prepared from squill, the sea onion Urginea maritima.
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Cardiac glycosides such as ouabain and proscillaridin were among the most potent compounds in the screen.
Bovine adrenals and hypothalamus are a major source of proscillaridin A- and ouabain-immunoreactivities.
Purification and some properties of an inhibitor of the sodium pump from bovine adrenals cross-reacting with proscillaridin A antibodies.