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. 2021 Jul 9;9:e11716. doi: 10.7717/peerj.11716

Table 1. List of 12 sets of fingerprint descriptors calculated from the PaDEL-Descriptor software.

Fingerprint Number Description
2D Atom Pairs 780 Presence/absence of atom pairs for various topological distances
2D Atom Pairs Count 780 Frequency count of atom pairs for various topological distances
E-state 79 Electrotopological state atom types
CDK 1,024 Fingerprint of length 1,024 and search depth of 8
CDK Extended 1,024 Extends the fingerprint with additional bits describing ring features
CDK Graph Only 1,024 A special version considering only the connectivity and not the bond order
Klekota-Roth 4,860 Presence/absence of SMARTS patterns for functional groups
Klekota-Roth Count 4,860 Frequency count of SMARTS patterns for functional groups
MACCS 166 Binary representation of chemical features defined by MACCS keys
PubChem 881 Binary representation of substructures as defined by PubChem
Substructure 307 Presence/absence of chemical substructures
Substructure Count 307 Frequency count of chemical substructures