AlvaDesc

AlvaDesc supports the calculation of molecular descriptors and fingerprints across multiple categories:

• 0D–3D molecular descriptors: including constitutional indices, topological indices, connectivity indices, geometrical descriptors, pharmacophore descriptors, charge descriptors, and more.^[7]
• Molecular properties: including LogP (octanol-water partition coefficient), molar refractivity, polar surface area (PSA), solvent-accessible surface area (SASA), and hydrogen bond donors/acceptors.
• Molecular fingerprints: including MACCS keys, Extended Connectivity Fingerprints (ECFP),^[8] Path-based fingerprints.
• Structural pattern detection: alvaDesc allows the identification of structural patterns in molecules using SMARTS-based matching, enabling the analysis of functional groups, substructures, and chemical motifs.
• 3D coordinate calculation: alvaDesc can generate 3D molecular structures from 1D/2D representations. The 3D coordinates calculation is performed using a Distance Geometry (DG) method, followed by a Force Field (FF) optimization.
• Descriptor analysis tools: including Principal Component Analysis (PCA), t-SNE analysis, correlation analysis, variable reduction.
• Support for disconnected structures: Handles salts, mixtures, ionic liquids, and metal complexes.
• Cross-platform compatibility: Available for Windows, macOS, and Linux, supporting both graphical user interface (GUI) and command-line interface (CLI).
• KNIME and Python integration: alvaDesc can be integrated into cheminformatics workflows using the KNIME analytics platform and Python scripting.

• Molecular descriptor
• Topological index
• Quantitative structure–activity relationship (QSAR)