SU-14813 is an oral, multitargeted tyrosine kinase inhibitor (TKI) targeting vascular endothelial growth factor receptors (VEGFR), platelet-derived growth factor receptors (PDGFR), KIT, and fms-like tyrosine kinase 3 (FLT-3). SU-14813 was developed as a next-generation TKI agent following sunitinib (SU-11248) designed to demonstrate optimized pharmacokinetic (PK) and tolerability profiles. SU14813 demonstrated broad and potent antitumor activity equivalent to that of sunitinib, which resulted in tumor regression, growth arrest, growth delay, and prolonged survival in established xenograft cancer models in mice. A phase II trial of SU-14813 in patients with breast cancer was completed. However, according to the Pfizer pipeline development has been discontinued.

GSK-1482160 is being evaluated for treatment of inflammatory pain (such as arthritis). This compound acts on P2X7 receptors, expressed by cells of innate and adaptive immunity. P2X7 receptors are involved in the production of pro-inflammatory cytokines that are thought to be an important mediator of inflammation. By blocking P2X7 receptors, less inflammatory chemicals are released, which possibly results in less inflammatory pain. Because of its ability to target P2X7R with high selectivity and to be radiolabelled with 11C, GSK-1482160 was suggested to be a useful biomarker for neuroinflammation via positron emission tomography (PET).

GLPG0187 is a compound that belongs to the class of organic compounds known as naphthyridines, and has been studied as a potential drug in the treatment of solid tumors. GLPG0187 is a broad spectrum integrin receptor antagonist that inhibits αvβ1 integrin. In vitro, this compound was found to diminish the size of the aldehyde dehydrogenase high subpopulation of prostate cancer cells dose-dependently. It also significantly reduced tumor cell migration and cell proliferation. In vivo, it reduced metastatic tumor growth, and inhibited the progression of bone metastases as well as the formation of new bone metastases. Phase I studies have been completed to study safety and drug tolerance of GLPG0187. The drug was well tolerated, but continuous infusion of GLPG0187 did not show signs of monotherapy efficacy.

MK-1064 is an orexin 2 receptor antagonist patented by pharmaceutical company Merck & Co for the treatment of insomnia. MK-1064decreases the amount of time spent in active wake and increases the time spent in rapid eye movement (REM) sleep and slow-wave sleep (SMS) in mice, rats, dogs, and rhesus monkeys. MK-1064, even at the very high dose did not show signs of an enhanced predisposition to cataplexy in the food-elicited cataplexy test. MK-1064 has now completed two Phase I studies focused on pharmacokinetics, safety and sleep in healthy volunteers. The effects of MK-1064 on sleep parameters were moderate, but statistically significant, representing the first demonstration of PSG-quantified sleep induced in humans by an OX2R antagonist. MK-1064 at 50, 120 and 250 mg decreased latency to persistent sleep and wake after sleep onset, and increased total sleep time and sleep efficiency.

PF-03654746 is a potent, selective antagonist of the human H3 receptor, developed by Pfizer. It was in the clinical trial phase II for the treatment of excessive daytime sleepiness (EDS) associated with narcolepsy, Tourette syndrome as well as potential anti-allergy applications and in phase I of clinical trial for the treatment of Schizophrenia and Alzheimer's disease, but these investigations were discontinued.

CPG-52364 is a potent antagonist of toll-like receptors TLR7, TLR8, TLR9. The drug was developed by Coley Pharmaceutical Group (later acquired by Pfizer) for the treatment of immune diseases and reached phase I of clinical trials presumably for systemic lupus erythematosus. However, the development of CPG-52364 was terminated by unknown reason.

Idazoxan is an alpha2 receptor antagonist which also shows activity at imidazoline I1 and I2 receptors and modulates the release of dopamine. Idazoxan was in phase II development in the US. Later the development of idazoxan for schizophrenia was discontinued. It was also in clinical trials for cognition disorders in United Kingdom, and was also discontinued. Idazoxan is used in scientific research as a tool for the study of alpha 2-adrenoceptors.

AZD9056 was developed as a selective inhibitor of the purinergic receptor P2X7, a key player in the generation and secretion of several proinflammatory cytokines. AZD 9056 participated is phase II clinical trials for osteoarthritis, inflammatory bowel disease, and chronic obstructive pulmonary disease but these studies were discontinued in 2009 because the drug failed to show significant efficacy in trials. In addition, in 2015 AZD 9056 was studied for the treatment of Crohn's disease (CD), although the drug has shown a beneficial risk profile the lack in the change of inflammatory biomarkers questions its anti-inflammatory potential.

JNJ-37822681 is a novel, potent, specific, centrally active, dopamine D2 receptor antagonist, which was developed by Johnson & Johnson. This drug is in the phase II of clinical trial for the treatment of schizophrenia. JNJ-37822681 has optimal brain disposition and somnolence was the most frequently reported adverse effect.