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Table 2 Descriptors in the hetero-atoms descriptors (HD) key

From: A generalizable definition of chemical similarity for read-across

Name Description
nN Number of Nitrogen atoms
nO Number of Oxygen atoms
nP Number of Phosphorous atoms
nS Number of Sulfur atoms
nF Number of Fluorine atoms
nCl Number of Chlorine atoms
nBr Number of Bromine atoms
nI Number of Iodine atoms
nB Number of Boron atoms
nHet Number of heteroatoms
nX Number of halogen atoms