Table 3 Molecular descriptors selected by CSAPSO-EDCD algorithm.

From: Prediction of pKa Values for Neutral and Basic Drugs based on Hybrid Artificial Intelligence Methods

No.

Molecular descriptors

Descriptor types

1

Relative number of N atoms

Constitutional descriptors

2

Randic index (order 3)

Topological descriptors

3

RNCG relative negative charged (QMNEG/QTMINUS) [Quantum-Chemical PC]

Electrostatic descriptors

4

RNCS Relative negative charged SA (SAMNEG * RNCG) [Zefirov’s PC]

Electrostatic descriptors

5

Max net atomic charge

Quantum descriptors