Pirandamine is the potential antidepressant drug. It is a relatively selective inhibitor of the serotonin uptake mechanism and does not exhibit appreciable norepinephrine uptake blocking activity in contrast to the tricyclic antidepressant drugs imipramine and amitriptyline. Pirandamine is equivalent to amitriptyline and greater than imipramine in potency as a serotonin uptake blocker and a potentiator of central serotonin pharmacological actions, and in contrast, does not exhibit appreciable central anticholinergic effects. Pirandamine potentiated the behavioral effects of 5-hydroxytryptophan in mice. Pirandamine, in contrast to desimipramine and imipramine, did not prevent reserpine-induced hypothermia. The (-)-enantiomer of pirandamine retained the activity of the racemate; the (+I-enantiomer was much less effective.

TAK-659 is an investigational, reversible, and potent dual inhibitor of SYK and FLT-3 kinases. TAK-659 inhibited the pro-survival, proliferative, chemoresistant, and activation effects promoted by the microenvironment. Combination of TAK-659 with other BCR inhibitors showed a synergistic effect in inducing apoptosis. Combination of TAK-659 and ibrutinib induced significantly higher cytotoxicity toward CLL cells. TAK-659 suppressed splenomegaly and tumor development in an LMP2A/Myc mouse model in nanomolar concentrations. In addition, TAK-659 also blocked metastasis of tumor cells into bone marrow. A phase Ib/II study of TAK-659 is underway in patients with relapsed or refractory acute myelogenous leukemia

Profadol is a pyrrolidine derivative patented in the 1960s by pharmaceutical company Parke-Davis as opioid analgesic. Profadol acts as a mixed agonist-antagonist of the μ-opioid receptor and in preclinical studies, Profadol precipitates abstinence in morphine-dependent monkeys and can reverse pethidine- induced narcosis in nondependent monkeys. In morphine-dependent human subjects, Profadol was also found to pre¬cipitate acute abstinence syndromes, with a potency 40 to 50 times less than that of nalorphine. Profadol, unlike other morphine-antagonists, does not produce nalorphine-like subjective effects. Over a fourfold range of doses, this drug was found to produce subjective effects indistinguishable from those of morphine. Also unlike other morphine-antagonists, profadol is quite active on the "classical" rodent tests for analgesia. It is about 1.3 times as potent as pethidine on the mouse hot-plate test, and about four times as potent on the rat tail-pressure test.