Diazepine

Diazepine is a seven-membered heterocyclic compound with two nitrogen atoms (e.g., in ring positions 1 and 2).

Types include:
 * 1,2-Diazepine
 * 1,3-Diazepine
 * 1,4-Diazepine
 * Benzodiazepines, a class of commonly used medications whose structure contains a 1,4-diazepine ring