Wiktionary
tienopramine
n. A tricyclic antidepressant, an analogue of imipramine with one benzene ring replaced with a thiophene ring.
Wikipedia
Tienopramine
Tienopramine is a tricyclic antidepressant (TCA) which was never marketed. It is an analogue of imipramine where one of the benzene rings has been replaced with a thiophene ring.