Zometapine (CI-781) is an antidepressant drug which is a pyrazolodiazepine derivative. Its molecular structure closely resembles thienodiazepines and is unrelated to other antidepressant drug classes.[1]
^Katz RJ (October 1984). "Effects of zometapine, a structurally novel antidepressant, in an animal model of depression". Pharmacology, Biochemistry, and Behavior. 21 (4): 487–90. doi:10.1016/s0091-3057(84)80027-1. PMID6542226. S2CID43507076.