Under Hantzsch–Widman nomenclature, a diazepine is a heterocycle with two nitrogen atoms, five carbon atom and the maximum possible number of cumulative double bonds.
Ifølge Hantzsch–Widman nomenklaturen er diazepin en heterocyklisk ring bestående af to kvælstofatomer, fem carbonatomer og det maksimalt mulige antal dobbeltbindinger.