Auriclosene (previously known as NVC-422) is a broad-spectrum, fast-acting topical anti-infective agent against microbial pathogens, including antibiotic-resistant microbes. It has been investigated in phase II clinical trials for the treatment of bacterial conjunctivitis and as a topical gel in children with impetigo. In addition, using a guinea pig model was shown, that auriclosene was effective in the treatment of dermatophytosis, including onychomycosis.

Clorgiline is a monoamine oxidase (MAO) inhibitor. Specifically, it is an irreversible and selective inhibitor of MAO-A. Clorgiline was under investigation for antidepressant and anxiolytic potential but has never been marketed, likely due to efficacy concerns. It continues to see routine use as a molecular probe in biomedical research examining a number of neurological disease and cancer models. In addition to inhibiting the MAO-A receptor, it has also been found to bind to the sigma1 receptor, and with high affinity to the I2 imidazoline receptor.

Englitazone is a thiazolidinedione antidiabetic agent. It has insulinomimetic and insulin-enhancing actions in vitro and glucose-, insulin-, triglyceride-, and cholesterol-lowering properties in an animal model of non-insulin-dependent diabetes mellitus. It acts as a peroxisome-proliferator-activated receptor-gamma ligand. Englitazone inhibits ATP-sensitive potassium and calcium-activated non-selective cation channels in a voltage-independent manner.

Azipramine, an antidepressant, that never been marketed.

IRDABISANT is a histamine H3 receptor inverse agonist with potential therapeutic utility in cognition enhancement.

Oxamarin was developed as a hemostatic agent. Information about the current use of this compound is not available.

Cyclopyrronium bromide is an anticholinergic agent, discovered by Robins Company, Inc. Ex vivo study has demonstrated that the compound was effective in inhibiting gastrointestinal motility in isolated guinea pig ileum.

Setileuton [MK-0633] is a selective inhibitor of the 5-lipoxygenase enzyme, which was under investigation for the treatment of asthma and atherosclerosis. Setileuton has been in phase II clinical trials by Merck Sharp & Dohme for the treatment of asthma, chronic obstructive pulmonary disease (COPD) and atherosclerosis. However, this research has been discontinued.

Albitiazolium (SAR97276) is a clinical antimalarial candidate from a series of choline analogs designed to inhibit plasmodial phospholipid metabolism. Albitiazolium exerts powerful in vitro and in vivo antimalarial activities. Albitiazolium has been shown to have appropriate pharmacokinetic and safety parameters in humans and it was being tested in phase II clinical trials by Sanofi, with confirmed antimalarial activity in adult patients. However, Sanofi discontinued development of Albitiazolium.