44 600 compounds Enamine has one of the largest commercial collections of screening compounds and building blocks exceeding 2.2 M molecules in total. Fast growing and permanent enhancement of our HTS & Building Block Collections with novel, top level synthetic chemistry resulted in the largest set of high-quality fragments. Enamine Ro3 Fragments comprise a remarkable number of new scaffolds and unique chemotypes within a most wide range of molecular frameworks. 
| Parameters | Range | | MW | 120 … 300 | | ClogP | -2.5 … 3.0 | | Hb Donors | 0 … 3 | | Hb Acceptors | 0 … 4 | | TPSA | 20 … 90 Å2 | | RotBonds | 0 … 4 | | Heavy atoms | 10 … 19 | | Mean Tanimoto distance (ECFP4) | 0.32 | Examples of compounds from Ro3 Fragment Library  Molecular properties of the Library
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