CP-601927 is a selective α4β2 nicotinic acetylcholine receptor partial agonist developed by Pfizer. The compound has antidepressant-like activity in animal models and was investigated in a phase 2 trial as an augmentation to other antidepressant therapy in patients with Major Depressive Disorder. However, CP-601927 ultimately lacked efficacy as an adjuvant in these patients because of insufficient activity of α4β2 at therapeutic doses.

MK-0359 (L-454560) is a selective and potent type 4 phosphodiesterases (PDE4) inhibitor, which binds to both the apo-(Mg2+-free) and holoenzyme states of PDE4. This compound successfully has passed the phase II clinical trial for the treatment of asthma, Pulmonary Disease, Chronic Obstructive (COPD) and Rheumatoid Arthritis. However, there is no information about the further research of this drug.

SCY-635 is a nonimmunosuppressive cyclosporine-based analog that exhibits potent suppression of hepatitis C virus (HCV) replication. SCY-635 has reached the phase II clinical trial for the treatment of patients with hepatitis C Infection. In addition, in the preclinical model, the SCY-635 was studied for the treatment of hepatitis-B in USA.

ATB-346, being developed by Antibe Therapeutics, a Toronto-based pharmaceutical company, is a hydrogen sulfide-releasing non-steroidal anti-inflammatory drug (NSAID) that inhibits COX and suppresses prostaglandin production. ATB-346 exhibits anti-inflammatory, analgesic, antinociceptive, immunomodulatory, and neuroprotective activities. In vivo, this compound attenuates zymosan-induced inflammation, nociception, and immune signaling. ATB-346 also prevents ligature-induced periodontal bone loss and pathologies, potentially by suppressing increases in pro-inflammatory cytokine levels. Additionally, ATB-346 decreases edema and improves neurological function in animal models of traumatic brain injury (TBI). ATB-346 completed Phase 1 clinical studies in Q1 2015. To better understand the metabolism of ATB-346, Antibe conducted a radiolabeled study in rats at Covance Laboratories that was completed in Q4 2015. Antibe received approval from Health Canada in March 2016 to conduct a Phase 2 trial of ATB-346 in patients with osteoarthritis of the knee. Preclinical studies of ATB-346 for the treatment intestinal cancer; malignant melanoma; periodontal disorders are in progress.

ASC-J9, also known dimethylcurcumin, is an androgen receptor (AR) degradation enhancer, it suppresses AR function via selective interruption between androgen receptors (ARs) and its selective co-activators (ARA55 or ARA70). This drug was successfully passed phase II clinical trial for topical application to treat the facial acne. In addition, ASC-J9 participated in the preclinical experiments to suppress prostatitis by altering the autoimmune response induced by CD4 T cell recruitment. In combination with sorafenib was shown, that ASC-J9 suppressed the hepatocellular carcinoma (HCC) progression via altering the pSTAT3-CCL2/Bcl2 signals.

APR-246 is a methylated form of PRIMA-1, 2-hydroxymethyl-2-methoxymethyl-aza-bicyclo[2.2.2]octan-3-one (PRIMA-1MET). APR-246, is a prodrug that is converted to the Michael acceptor methylene quinuclidinone (MQ) that binds covalently to cysteines in p53, leading to refolding and restoration of wild type p53 function. MQ also targets the cellular redox balance by inhibiting thioredoxin reductase (TrxR1) and depleting glutathione. APR-246 can rescue mutant forms of the p53 family members p63 and p73 that share high sequence homology with p53. APR-246 has demonstrated compelling pre-clinical antitumor activity in a wide variety of solid and hematological (blood) tumors, including ovarian cancer, small cell lung cancer, esophageal cancer and acute myeloid leukemia (AML), among others. Furthermore, strong synergy has been seen with both traditional anticancer agents, such as chemotherapy, as well as newer mechanism-based anticancer drugs. A Phase I clinical study has been completed, demonstrating a favorable safety profile and both biological and clinical responses in hematological tumors with mutations in the p53 gene. A Phase Ib clinical study in combination with full dose chemotherapy (carboplatin and pegylated liposomal doxorubicin) has also been completed, demonstrating a favorable safety profile in patients with high-grade serous ovarian cancer (HGSOC). APR-246 is currently in a Phase II clinical trial in patients with HGSOC, and additional Phase Ib clinical studies of APR-246 in other cancer indications are planned.