pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.54	IUPAC digitized pKa	1	0	[NH3+]N(Br)c1ccccc1	NN(Br)c1ccccc1	mol8811	NN(Br)c1ccccc1