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. 2021 Jan 13;26(2):386. doi: 10.3390/molecules26020386

Table 5.

Empirical rules for predicting the oral availability and toxicity properties of the studied ligands.

Properties Oral Availability Toxicity
Lipinski Rules Veber Rules Pfizer 3/75 Rules
MW ≤500 - -
cLogP ≤5 - ≤3
HBA ≤10 - -
HBD ≤5 - -
TPSA - ≤140 ≤75
RB - ≤10 -

MW: Molecular weight; LogP: Octanol/water partition coefficient; HBA: Hydrogen bond acceptor; HBD: Hydrogen bond donor; TPSA: Topological polar surface area; RB: Rotatable bond count.