Tree based on the pairwise Tanimoto-fingerprint distances between the 25 COX
inhibitors tested in the present study. The heat map highlights the distances
calculated in the first 5 principal components space (% variance
explained > 90%) originating from 10 physico-chemical
descriptors (i.e. net charge, MW, LogP, LogS, HBD, HBA, PSA, no. of atoms, no.
of rings and no. of rotatable bonds).