What is "furazan"

n. (context organic compound English) The heterocycle 1,2,5-oxadiazole

Furazan, or 1,2,5-oxadiazole, is an heterocyclic aromatic organic compound consisting of a five-atom ring containing 1 oxygen and 2 nitrogen atoms. The furazan ring system is also found in the steroid furazabol. Furazan and its derivatives are obtained from the oxime derivatives of 1,2- diketones.