pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.09	IUPAC digitized pKa	1	0	Cn1c([NH3+])cccc1=O	Cn1c(N)cccc1=O	mol6361	Cn1c(N)cccc1=O