<unk>  (Dozonone) is a cardiotonic and vasodilator drug which was developed and marketed in the 1980s for the treatment of heart disease. It acts as a selective PDE3 inhibitor. It is no longer available.
Quazinone
Diprobase
Triprolidine
Chlorpyrifos
Nitisinone
Echinopsidine
Dimetacrine
Pargyline