pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
6.17	IUPAC digitized pKa	1	0	Cn1cnc2c[nH+]ccc21,Cn1c[nH+]c2cnccc21	Cn1cnc2cnccc21	mol7981	Cn1cnc2cnccc21