Clomipramine- 13 C,d 3 (hydrochloride) is the 13 C- and deuterium labeled Clomipramine (hydrochloride). Clomipramine (Chlorimipramine) hydrochloride is a potent 5-HT reuptake blocker with the IC50 value of 1.5 nM. Clomipramine hydrochloride is a tricyclic antidepressant that can be used for the research of depression and obsessive compulsive disorder (OCD).