What is "thiepine"

n. (context organic compound English) An unsaturated seven-membered heterocycle having six carbon atoms, one sulfur atom and three double bonds

In organic chemistry, thiepine (or thiepin) is an unsaturated seven-membered heterocyclic compound, with six carbon atoms and one sulfur atom.

Benzothiepines have one fused benzene group and dibenzothiepines such as dosulepin and zotepine have two fused benzene groups. Damotepine is another thiepin derivative.