What DEL-Derived Hits Reveal About Library Design

Library design decisions leave a lasting imprint on the compounds that emerge from DNA-encoded library (DEL) screens—shaping not only diversity, but the practicality of advancing hits into viable drug candidates. Evidence shows that prioritizing balanced, lead-like chemical properties over sheer library size yields compounds that are easier to optimize, with reduced downstream burden on medicinal chemistry. Comparative data highlights how chemistry-driven libraries produce hits with more favorable molecular weight, lipophilicity, and polar surface area, supporting efficient SAR development and minimizing corrective work. With DEL-derived molecules from X-Chem advancing to eight clinical candidates, the quality of the starting point proves critical to long-term program success.

Explore how thoughtful library design can improve hit triage, reduce risk, and accelerate progression to the clinic.