Ravidasvir (RDV, ASC16) is a second‐generation, pan‐genotypic non‐structural (NS) 5A inhibitor, which inhibits viral replication and assembly. Ravidasvir exhibits high antiviral potency with EC50 0.04–1.14 nM for HCV GT1–GT6. The pharmacokinetics results indicated that steady status achieved quickly after the first dose. Metabolism studies utilizing human clinical samples showed that Ravidasvir was very stable, with only modest (~2%) metabolite formation. Biliary excretion of Ravidasvir appears to be the primary route of elimination of the absorbed dose, while renal excretion of the intact drug appears to be negligible. In clinical trans twelve-week Ravidasvir and ritonavir-boosted Danoprevir in combination with ribavirinfor 12 weeks achieve the sustained virologic response rate of 100% in treatment-naïve non-cirrhotic Asian patients with HCV GT1 infection. Ravidasvir for treatment‐naïve, non‐cirrhotic HCV GT1 patients was safe and well tolerated. There was no death, treatment‐related serious adverse events, and discontinued cases due to adverse events.

Navarixin (SCH 527123) is an oral antagonist of CXC receptors 1 and 2. The drug is currently under Phase II trial for the treatment of psoriasis, COPD and asthma.

Deleobuvir is a drug for the treatment of Hepatitis C, developed by Boehringer Ingelheim. Deleobuvir is a non-nucleoside HCV NS5B polymerase inhibitor that reversibly and noncovalently binds to the thumb pocket 1. It has shown rapid and strong antiviral activity when administered in combination with peginterferon-a2a and ribavirin. In 2014 Boehringer Ingelheim decided to halt further development of deleobuvir because preliminary analysis of phase 3 clinical trials indicated a low efficacy of the drug.

PF-04958242 is an AMPA receptor potentiator for the potential treatment of cognitive deficits in schizophrenia. But recent study revealed that there were no pharmacokinetic interactions between PF-04958242 and ketamine. 'High-impact' AMPAR potentiators like PF-04958242 may have a role in the treatment of the cognitive symptoms, but not the positive or negative symptoms, associated with schizophrenia. In addition, a clinical study was underway to evaluate the effects of PF-049582432 in subjects with age-related hearing loss in the US. PF-04958242 has been classified as glycine transporter (GLYT-1) inhibitor in this study. However, this development was discontinued.

Tetramethylhexamethylenediamine (6,3-ionene) is a Hexanediamine derivative patented by Abbott Laboratories. U.S.A. as heparin neutralizer. Heparin is anionic polymer and positively charged Tetramethylhexamethylenediamine, prevents its anticoagulant action. The antagonistic capacity would be due to the PEC formation between the ionene and heparin. Tetramethylhexamethylenediamine can also be used as an antispasmolytic drug.

LCQ908 (Pradigastat) is a diacylglycerol acyltransferase-1 (DGAT-1) inhibitor. DGAT-1 is one of the two DGAT enzymes that catalyse the formation of triglycerides from diacylglycerol and acyl- coenzyme A. DGAT-1 catalyses the final committed step in processing dietary fatty acids into triglycerides carried on chylomicrons for transport around the body. Pradigastat may decrease the level of triglycerides in the blood and is intended for the first line treatment of FCS. It is administered orally at 10-40mg daily in addition to a low fat diet. Pradigastat is also in phase II clinical trials for type 2 diabetes and severe hypertriglyceridaemia (familial hyperchylomicronaemia phenotypes I and V). Pradigastat is a designated orphan drug in the EU. In a phase III clinical trial.

SAMARIUM SM-153 is a β- and γ-emitter with a physical half-life around 46.8 hours. Sm-153 treatment is recommended for patients with multiple bone metastases with the osteoblastic component, regardless of the primary tumor’s location. This compound was used in prostate cancer. It was shown that the small influence of Sm-153 on hematological parameters in patients treated with Sm-153, because of the high affinity of Sm-153 to osteoblastic metastases, and of the effect of low concentration of radionuclide in healthy bone tissue.

Nelociguat, a soluble guanylate cyclase (sGC) activator, has been in phase II clinical trials by Bayer for the treatment of erectile dysfunction and heart failure. However, no recent development has been reported. Nelociguat is a direct soluble guanylate cyclase (sGC) stimulator that acts independently of nitric oxide (NO); has an EC50 of 353 nM on P-VASP formation in rat aortic smooth muscle cells. BAY 60-4552 is pharmacologically active major metabolite of Riociguat.