pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
8.8	IUPAC digitized pKa	0	-1	Cn1cnc2nc[nH]c2c1=O	Cn1cnc2nc[n-]c2c1=O	mol9663	Cn1cnc2nc[nH]c2c1=O