pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.31	IUPAC digitized pKa	0	-1	CN1C=CC=C(O)N1	CN1C=CC=C([O-])N1	mol6965	CN1C=CC=C(O)N1