TPSA

With the aging population and increasing competitive pressures, neurodegenerative diseases of the central nervous system (CNS) have become a serious medical challenge in modern society, including Parkinson's disease, Alzheimer's disease, brain tumors, and multiple sclerosis. The CNS MPO (Multi-Parameter Optimization) score is a widely recognized algorithm in medicinal chemistry. Developed by Pfizer, this method is based on an analysis of approved CNS drugs and their interior CNS drug candidates, establishing the CNS MPO rules. It incorporates six key physicochemical properties (ClogP, ClogD, MW, TPSA, HBD, and pKa) to prospectively optimize CNS drug attributes—such as high blood-brain barrier (BBB) permeability, low P-gp efflux liability, low metabolic clearance, and high safety—thereby improving the clinical success rate of CNS drug candidates. The CNS MPO compound library is a collection of compounds with CNS MPO scores greater than 5, specifically designed for CNS drug discovery.

The basic requirements for the compounds that are supposed to penetrate the blood-brain barrier are somewhat different from those for the majority of drug discovery projects. Alongside the known problem with delivery of the large and non-polar compounds and their penetrability through the cell membrane, the other issue arises as well: small and polar compounds are not able to pass the Blood-Brain Barrier. Chemspace CNS-focused library comprises quite small, non-polar compounds that are also free from PAINS/toxic fragments and aggregators.

Several CNS multi-parameter scoring approaches have been reported: CNS-MPO, CNS-MPO V.2, CNS-TEMPO, which suggesting an algorithm to predict CNS-ike properties of new chemical entities. We have applied these scoring algorithms to select macrocycles satisfying multiple cut-offs and structural desirability criteria. The resulting set consists of 1,122 macrocyclic compounds with CNS-MPO > 4, CNS-MPO.v2 > 4, and CNS-TEMPO < 4 for CNS-related drug discovery and research.

UORSY New Generation Screening Library contains about 1,900,000 compounds. The library is a revolutionary collection of lead-like molecules with outstanding structural quality and diversity—New Generation Screening Library (NGSL). Its core is decorated with interesting building blocks, including important medicinal fragments such as peptide bonds, amino groups and hydroxyl groups. and designed for discovery of new Voltage-gated calcium channel blockers.