ArticleJournal of medicinal chemistry2026
Property-Biased Covalent DNA-Encoded Library Screening Enabled the Discovery of AM-8719, A Structurally Novel, CNS-Penetrant KRAS G12C Inhibitor.
Article in Journal of medicinal chemistry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Activating mutations in the Kirsten rat sarcoma (KRAS) gene are prevalent oncogenic drivers in nonsmall cell lung cancer (NSCLC). Patients harboring KRAS-mutant lung cancers frequently develop central nervous system (CNS) metastases. Although approved KRAS G12C inhibitors (i.e., sotorasib and adagrasib) show promising clinical CNS activity, these agents demonstrate low preclinical brain-to-plasma ratios, raising the question of whether compounds with elevated preclinical Kp,uu,brain values might show enhanced clinical performance. Here, we report the first successful application of DNA-encoded library (DEL) screening technology to the identification of CNS-penetrant covalent inhibitors of KRAS G12C. In this effort, a property-biased covalent DEL-screening approach enabled the discovery of a structurally novel series of hydrogen bond donor-free KRAS G12C inhibitors with improved CNS exposure. Leveraging structure-based design, we refined this hit series to deliver lead compound AM-8719, a CNS-penetrant, orally efficacious KRAS G12C inhibitor exhibiting 200-fold improved potency with respect to initial screening hits.
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