Tracazolate (ICI 136,753), a pyrazolopyridine, is a non-benzodiazepine with anxiolytic-like activity in animal models. It is known to interact with gamma-aminobutyric acid (GABA)(A) receptors, adenosine receptors, and phosphodiesterases. Its intrinsic efficacy, potentiation, or inhibition is determined by the nature of the third subunit (gamma1-3, delta, or epsilon) within the GABA(A) receptor complex.

Tipredane is one of the compounds of a new series of sulfur-containing steroids synthesized at The Squibb Institute for Medical Research and is being developed for topical treatment of human dermatoses. Tipredane is structurally unique in that the classical l7-beta two-carbon side chain and the 17-alpha hydrogen of the steroid have been replaced by two alkylthio substituents. Tipredane has been shown to possess moderate to potent anti-inflammatory activity in various animal models, and to exhibit favorable separation of local anti-inflammatory activity from adverse systemic effects in both animals and humans. After oral administration, [3H]tipredane was rapidly absorbed, metabolized, and excreted into urine and feces. Metabolism of tipredane was rapid and complex, with significant species differences, although the disposition in rhesus and cynomolgus monkeys seemed to be similar to humans. Tipredane had been investigated as the therapeutic agent for the treatment of allergic rhinitis, asthma and skin disorders. However, this development was discontinued.

KOSN-1724, also known as iso-fludelone, is the third-generation epothilone B analogue. It binds to tubulin and induces microtubule polymerization/reduces microtubule depolymerization, resulting in the inhibition of cell division and induction of apoptosis. KOSN-1724 is in phase I clinical trials for the treatment of solid tumors.

CUDC-101 is a multi-targeted agent designed to inhibit epidermal growth factor receptor (EGFR), human epidermal growth factor receptor Type 2 (Her2) and histone deacetylase (HDAC). This drug synergistically blocked key regulators of EGFR/HER2 signaling pathways, also attenuating multiple compensatory pathways, such as AKT, HER3, and MET, which enable cancer cells to escape the effects of conventional EGFR/HER2 inhibitors. Thus, a single compound may offer greater therapeutic benefits, which is verified in clinical trial phase I for the treatment patients with advanced head and neck, gastric, breast, liver, and non-small cell lung cancer tumors. In April 2013, CURIS, INC determined that they would discontinue enrolling patients in phase 1 expansion trial of the intravenous formulation of CUDC-101, and that the future development of CUDC-101 would be dependent on our ability to successfully develop an oral formulation of CUDC-101. However, the efforts to develop an effective oral formulation with improved bioavailability have not resulted in significant improvements when compared to the intravenous formulation of CUDC-101. As a result, at this time CURIS no longer plan to make material investments in this program.

LY2886721 is a BACE inhibitor used for the treatment of Alzheimer's Disease. LY2886721 did not inhibit other aspartyl proteases such as cathepsin D, pepsin, and renin, and reduced Aβ in a dose-dependent manner in HEK293Swe cells and in primary neurons from PDAPP transgenic mice. LY2886721 was the first BACE inhibitor to reach Phase 2 clinical research. Lilly completed six Phase 1 studies of LY2886721’s safety, tolerability, and pharmacology in a total of 150 healthy volunteers and people with Alzheimer’s disease at doses of 1–70 mg. Single and multiple ascending oral dosing was accompanied by repeat CSF sampling in the hours and days thereafter. This was done to assess CSF penetration and target engagement by way of measuring levels of the drug, BACE1 substrate, and BACE1 cleavage products. The compound lowered CSF Aβ40, Aβ42, and sAPPβ concentrations while increasing sAPPα, consistent with expectations for BACE1 inhibition. Fourteen days of daily dosing reduced BACE1 activity by 50–75 percent, and CSF Aβ42 by 72 percent. No safety concerns were apparent in dosing up to six weeks

Hexasonium, an anticholinergic agent, was studied as a spasmolytic. Information about the current use of this drug is not available.

Pefcalcitol (previously known as M518101), an analog of vitamin D3 (VD3), is an antipsoriatic drug candidate that is designed to achieve much higher pharmacological effects, such as keratinocyte differentiation. This drug is a phosphodiesterase inhibitor and is being developed as a topical ointment formulation. Pefcalcitol was involved in phase III clinical trials in the USA and in Japan in subjects with plaque psoriasis and with palmoplantar keratoderma. In addition, it participated in phase II clinical trial for the warts treatment.