pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
6.56	IUPAC digitized pKa	1	0	O[C@H]1NC=[NH+]c2ncccc21,O[C@H]1NC=Nc2[nH+]cccc21	O[C@H]1NC=Nc2ncccc21	mol8019	OC1NC=Nc2ncccc21