Ipenoxazone (NC 1200) is a muscle relaxant that is under investigation (phase II) for the treatment of Alzheimer's Dementia, Cognition Disorders. It acts as an Ionotropic glutamate receptor antagonist.

Loreclezole was found to be active in all animal models of seizures, whether a genetic model of reflex epilepsy was used or models where seizures were elicited by chemical or electrical stimulation. In addition, loreclezole was active against both TON and CLON seizures and increased the threshold for behavioral as well as EEG seizures. Loreclezole has a very rapid onset of action and a duration of the activity, which in certain tests last for more than 24 hr. Chronic administration for 5-7 days did not lead to tolerance to the anticonvulsant action of loreclezole. Loreclezole potentiates gamma-aminobutyric acid (GABA) type A receptor function, by interacting with a specific allosteric modulatory site on receptor beta-subunits. It also acts as a negative modulator at a novel regulatory site, enhancing GABAA receptor sensitization. Inhibits homomeric ρ1 GABAC receptors.

Quintiofos is phosphonothioic ester derivative patented by Farbenfabriken Bayer A.-G. as insecticide and ascaricide, particularly against parasites of the larger animals.

Reclazepam is a benzodiazepine derivative. Benzodiazepines are primarily used to treat anxiety.

Ramnodigin is a cardenolide derivative patented by Farbwerke Hoechst A.-G. as cardiotonic, diuretic, and antidiarrheic compound. In in vitro studies, Ramnodigin shows cytotoxicity against nonsmall cell human lung cancer cells.

Repinotan (BAYX3702) is a highly selective 5-HT1A receptor agonist that has shown neuroprotective effects in animals (attenuating NMDA-induced delayed neuronal death in rats). Repinotan inhibits glutamate induced depolarization. A variety of mechanisms and pathways is thought to be involved in its efficacy, such as activation of the anti-apoptotic phosphatidylinositol 3-kinase (PI-3K) pathway, inhibition of glutamate release, extracellular-regulated kinase (Erk)-stimulated Bcl-2 expression or inhibition of caspase-3 activity, and increased release of the neurite extension factor S-100 beta. Based on results in animal studies, repinotan could be a promising candidate for treating acute ischemic stroke in humans. A phase II clinical trials in patients with acute ischemic stroke was completed in 2009.

Tagorizine (also known as AL-3264) is a pyridylacrylamidoalkylpiperazine derivative patented by Dainippon Pharmaceutical Co., Ltd as an antiallergic agent. Tagorizine acts as 5-lipoxygenase inhibitor and blocks histamine H1-receptors in isolated guinea pig trachea, inhibits antigen-induced histamine release from isolated rat peritoneal mast cells, and suppress leukotriene production from activated human leukocytes. In preclinical models Tagorizine inhibited the antigen-induced leukotriene production in the abdominal cavity of passively sensitized rats and suppressed the arachidonic acid-induced ear edema in mice.

Tabilautide (also known as RP 56142) is a tripeptide derivative patented by Rhone-Poulenc Industries S. A. as an immune adjuvant. In preclinical studies, Tabilautide displays potent protective activities against bacterial infections such as K. pneumoniae, L. monocytogenes or S. Typhimurium. Besides that Tabilautide shows antimetastatic activity and induces macrophage activation and enhanced cytotoxicity of natural killer cells in spleen, blood, and liver. These activities correlate with prophylactic and therapeutic effects of Tabilautide on artificial liver metastases of histiocytosarcoma.

Tallimustine (also known as FCE 24517), an alkylating benzoyl mustard derivative of distamycin A that was studied as an anti-tumor agent. Tallimustine participated in phase I clinical trial in patients with advanced cancer. As a result, the was obtained the recommended Phase II dosage for tallimustine. However, the further development of this drug was discontinued.

Taleranol (also known as P-1560) a weak estrogen and a minor metabolite and epimer of the drug, zeranol. Zeranol is an anabolic agent that used in animal feed and is intended for human consumption, is noncarcinogenic, nonteratogenic, and nonmutagenic.