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. 2007 Dec 6;3(3):435–444. doi: 10.1002/cmdc.200700139

Table 1.

Compound selection criteria.

Selection criteria Definition
Absence of unwanted functionalities: No unwanted groups (see supplementary material)
Lead-like properties: 10–27 heavy atoms
<4 hydrogen-bond donors
<7 hydrogen-bond acceptors
0 <(hydrogen-bond donors + hydrogen bond acceptors)<10
0–4 ClogP/ClogD
If the compound contains only one ring system at least one atom has to be outside the ring.
Limited complexity: <8 rotatable bonds
<5 ring systems
No ring systems with more than two fused rings