Legacy Screening Collection


last updated January 2023

Our screening compound library comprises over 1.2M compounds. This collection has resulted from our 15 years efforts in supporting drug discovery through high-throughput screening. We offer the compounds assembled from the in-house made building blocks utilizing the developed and thoroughly optimized reactions including popular in medicinal chemistry amide bond formation, arylation and alkylation. In the collection design, we have widely exploited a convergent synthesis approach that furnished high diversity of the chemical structures.

More than 85% of our compounds have drug-like physicochemical profiles, and more than 35% – lead-like profiles.


We also offer three diverse sets of screening compounds that cover broad chemical space:

  • 20k
  • 10k
  • 5k

The diversity increases from the largest to the smallest set. Each library is filtered from Pan-Assay Interference and “boring chemistry” substances to ensure its quality.

Physicochemical profiles of UOrSy diverse screening sets are shown on histograms below:


UOrSy screening libraries are available in stock and could be delivered within 2 weeks in any customer-preferred format: as powders, dry films or DMSO solutions formatted in vials, 96 or 384-well plates. All compounds have a minimum purity of 90% assessed by 1H NMR; analytical data is provided.

For more information, please contact us at screenlibs@uorsy.com

Your questions and requests are always welcome!
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