<unk>  (or<unk> e) is a cardiac glycoside.  Apocynum cannabinum used as a source of fiber by  Native Americans and Apocynum venetum used as a herbal tea in China both contain<unk> .<unk>  is a cardiac glycoside and an anti-arrhythmia and cardiotonic agent.
Cymarin
Heparin
Ticlopidine
Oxeladin
Iotalamic acid
Lepirudin 
Aprotinin
Bemiparin