PR-104 is a phosphate ester dinitrobenzamide mustard pre-prodrug that is rapidly hydrolyzed systemically to PR-104A, a bioreductive prodrug. PR-104A is in turn activated via reduction by NADPH:cytochrome P450 oxidoreductase and other one-electron reductases in hypoxic cells, and by aldo-keto reductase 1C3 (AKR1C3) independently of oxygen, to the corresponding hydroxylamine (PR-104H) and amine (PR-104M) metabolites. Subsequently, these reactive nitrogen mustards crosslink DNA and cause cytotoxicity in cells. PR-104 is known to have preclinical anti-tumor activity in human tumor xenograft models as mono-therapy and in combination with radiotherapy and chemotherapy. Thrombocytopenia, and to a lesser extent neutropenia, was the dose-limiting toxicity of weekly PR-104. Combination of PR-104 with docetaxel or gemcitabine caused dose-limiting and severe myelotoxicity in patients with advanced solid tumors. PR-104 had been in phase II clinical trial for the treatment of acute myeloid leukemia.

JNJ-18038683 is a 5-hydroxytryptamine type 7 receptor antagonist with potential antidepressant efficacy. It is under development for the treatment of the bipolar disorder.

FEPENTOLIC ACID is a choleretic agent.

Iomeglamic Acid is an iodinated aryldicarboxylic acid monoamide used as insoluble X-ray contrast media. Iomeglamic acid has been successfully applied for radioscopy of the gall-bladder since 1972 but currently discontinued.

Lapachone (aka beta-Lapachone) is an ortho naphthoquinone, originally isolated from a tree whose extract has been used medicinally for centuries. It has garnered interest as a potential therapeutic or lead compound against a number of disease conditions including cancers, and blindness due to retinopathy of prematurity. It is lethal to a number of cancer cell types at micromolar concentrations, and it is capable of enhancing the efficacy of radiation therapies against cultured cells. A number of clinical trials have been conducted.

Fenaftic acid is a choleretic agent.

Indiplon is a nonbenzodiazepine, hypnotic sedative that was proposed for the treatment of insomnia. It is a high-affinity allosteric potentiator of GABAA responses that demonstrates preference for α1 subunit-containing GABAA receptors. There is minimal potential for adverse effects, residual daytime sedation, tolerance, respiratory depression. The simultaneous administration of indiplon and alcohol did not result in any significant pharmacokinetic changes. There is little risk of pharmacokinetic interaction between indiplon and any co-administered drugs. Developer (Neurocrine) decided to discontinue all clinical and marketing development of Indiplon in the United States.

Muraglitazar previously known as BMS-298585 has been identified as a non-thiazolidinedione dual agonist of peroxisome proliferator-activated receptor alpha/gamma. Muraglitazar is currently in clinical trial phase III development for the treatment of type 2 diabetes and dyslipidemia.

Adipiplon is an oral, partial agonist of the GABAA alpha-3 (α3) receptor that was being developed by Neurogen Corporation for the treatment of insomnia, anxiety disorders and schizophrenia. Adipiplon has been tested in Phase 1 and 2 studies in over 600 subjects for the treatment of insomnia, demonstrating statistical significance compared to placebo on primary endpoints for sleep initiation and maintenance in patients with chronic insomnia. Adipiplon has also demonstrated statistical significance compared to placebo for self-reported quality of sleep in all completed Phase 2 studies to date. Additionally, in studies completed to date it has been well tolerated at all doses tested. Development of adipiplon was discontinued during 2008.

Zoniporide hydrochloride is a novel, potent and selective NHE-1 inhibitor (IC50 = 14 nM). Reduces infarct size in the isolated heart (EC50 = 0.25 nM). Attenuates post-ischemic cardiac contractile dysfunction and ischemia-reperfusion-induced ventricular fibrillation in vivo. Zoniporide hydrochloride represents a novel class of potent and selective human NHE-1 inhibitors with potential utility for providing cardioprotection in a clinical setting.