pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
6.99	IUPAC digitized pKa	0	-1	Cn1ncc(=O)[nH]c1=O	Cn1ncc(=O)[n-]c1=O	mol9157	Cn1ncc(=O)[nH]c1=O