N-Methyl-D-aspartic acid is an amino acid derivative acting as a specific agonist at the NMDA receptor, and therefore mimics the action of the neurotransmitter glutamate on that receptor. Unlike glutamate, NMDA only binds to and regulates the NMDA receptor and has no effect on other glutamate receptors (such as those for AMPA and kainate). NMDA receptors are particularly important when they become overactive during withdrawal from alcohol as this causes symptoms such as agitation and, sometimes, epileptiform seizures. NMDA is a water-soluble synthetic substance that is not normally found in biological tissue.

PF-477736 is a selective, potent and ATP-competitive Chk1 inhibitor. Compound was tested in combination with gembcitabine in phase I clinical trials in patients with advanced solid tumors.

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

MRX-I is a potent oxazolidinone antibiotic against Gram-positive pathogens, including methicillin-resistant Staphylococcus aureus, penicillin-resistant Streptococcus pneumoniae, penicillin-intermediate S. pneumoniae, and vancomycin-resistant enterococci. MRX-I demonstrated comparable or slightly higher activity than linezolid and was active against enterococci resistant to both vancomycin and teicoplanin. In addition, MRX-I exhibited bactericidal activities against staphylococci and streptococci but was bacteriostatic against enterococci. MRX-I inhibits formation of functional 70S initiation complex essential for bacterial protein synthesis, leading to the cessation of bacterial growth. Oral MRX-I was associated with a greater bioavailability and exposure when administered with food, and minimal accumulation of MRX-I occurred after multiple-dose administration. Oral MRX-I was well tolerated at single doses of up to 1,200 and 800 mg q12h for up to 28 days; all adverse events were mild to moderate in severity, and there was no drug discontinuation due to adverse events.

Etripamil is a non-dihydropyridine, L-type calcium channel blocker. Currently, etripamil is in Phase 3 development for the treatment of paroxysmal supraventricular tachycardia. Milestone Pharmaceuticals is also developing etripamil to provide rapid heartbeat control for patients living with atrial fibrillation and acute symptom relief for patients with angina.