Tebatizole was developed as an antidepressant. Information about the current use of this compound is not available.

Tebuquine (also known as WR 228,258) is an antimalarial agent that is significantly more active than amodiaquine and chloroquine and was the most active compound tested against both strains of Plasmodia. Information about the current use of this drug is not available.

Telenzepine is a selective muscarinic M1 receptor antagonist that was studied for selective inhibition of gastric acid secretion. Telenzepine was used in clinical trials in patients with acute duodenal ulcer, where was found that once daily administration of 3 mg in the evening must be regarded as the optimal dosage regimen of telenzepine. However, the preregistration for peptic ulcer in Germany was discontinued. In addition, the drug was studied in patients with nocturnal asthma. It was shown that telenzepine via the oral route at a dose of up to 5 mg was not effective in preventing nocturnal asthma.

Moxiraprine (also known as CM-30366) is aminopyridazine derivative with antidepressant activity. In preclinical studies Moxiraprine induced stereotyped behaviour and antagonized haloperidol-induced catalepsy in rats, after parenteral and oral administration. In 6-hydroxy dopamine (6-OHDA)-lesioned mice, Moxiraprine induced contralateral rotations and, when injected before 6-OHDA, protected mice against its neurotoxicity. Moxiraprine also provoked contralateral rotations when injected directly into the mouse right striatum. After parenteral injection, Moxiraprine slightly increased motility in mice, at least at low doses. The stereotypies and rotations (after intrastriatal injection) induced by Moxiraprine were antagonized by haloperidol, alpha-methyl-p-tyrosine and reserpine. The effects of Moxiraprine were compared to those of direct and indirect dopamine-like drugs. Bromocriptine induced a behavioural profile, which in most aspects, was qualitatively and quantitatively similar to that of Moxiraprine. Apomorphine was found slightly more potent than Moxiraprine, but in contrast to the latter, apomorphine-induced stereotypies were insensitive to alpha-methyl-p-tyrosine or reserpine. (+)-Amphetamine and nomifensine were less potent than Moxiraprine, and unlike Moxiraprine, induced ipsilateral rotations in 6-OHDA-lesioned mice.

Motapizone is a pyridazinone derivative patented by pharmaceutical company Nattermann, A., und Cie. G.m.b.H. as an antithrombotic and hypotensive agent. Motapizone ats as a potent inhibitor of the isoenzyme phophodiesterase type III. In preclinical studies potent antithrombotic and hypotensive properties of motapizone has been shown in rats, cats, and dogs. In normal human volunteers, single oral doses of motapizone up to 10 mg produced significant inhibition of platelet aggregation measured by the ex vivo method. These effects were dependent upon the dose of motapizone and associated with an increase in heart rate and a reduction in diastolic blood pressure.

Tivantinib (ARQ 197) is the first non-ATP-competitive small molecule that selectively targets the c-Met receptor tyrosine kinase. Exposure to Tivantinib resulted in the inhibition of proliferation of c-Met-expressing cancer cell lines as well as the induction of caspase-dependent apoptosis in cell lines with constitutive c-Met activity. ArQule and its collaborators Daiichi Sankyo and Kyowa Hakko Kirin are developing tivantinib as a potential therapy for many cancers. c-Met is overexpressed in many cancers. Tivantinib currently is in phase 3 clinical development for the treatment of hepatocellular carcinoma and non-small cell lung cancer.

Rosterolone (also known as a17α-propylmesterolone) is a synthetic 5alpha-reduced steroid that was studied for acne treatment on animal models. It was shown that the topical administration was more effective than systemic treatment. Rosterolone exerted a potent topical sebosuppressive effect in the animal model. This compound has never been marketed.

Nitrocycline is a tetracycline antibiotic.

Nitricholine is a cholinergic agent.