ANA-12 is a low-molecular weight antagonist of tropomyosin-related kinase B (TrkB), which is the main receptor of neurotrophin brain-derived neurotrophic factor (BDNF). TrkB and BDNF are both the key mediators in the pathophysiology of several mood disorders, including anxiety and depression. ANA-12 showed direct and selective binding to TrkB and inhibited processes downstream of TrkB without altering TrkA and TrkC functions. It was shown, that mice administered ANA-12 demonstrated reduced anxiety- and depression-related behaviors on a variety of tests predictive of anxiolytic and antidepressant properties in humans.