logPnin
logPnin is a descriptor used in cheminformatics to denote the lipophilicity of a compound in its neutral form. The term combines logP, the octanol–water partition coefficient, with "nin" to indicate neutral, non-ionized status. logPnin therefore represents the predicted or calculated logP value assuming the molecule exists without ionizable groups turned on or off by pH, and is distinct from pH-dependent measures such as logD.
Calculation methods: It is typically derived by fragment-based approaches that assign hydrophobic fragments to molecular components
Applications and interpretation: logPnin helps researchers compare intrinsic lipophilicity of different scaffolds independent of ionization state,
Limitations and caveats: As with logP, logPnin is a model-dependent quantity and may not correspond to a