pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
8.18	IUPAC digitized pKa	0	-1	O=Nc1ccc(O)c2ccccc12	O=Nc1ccc([O-])c2ccccc12	mol11284	O=Nc1ccc(O)c2ccccc12