pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
-3.22	IUPAC digitized pKa	1	0	c1ccc(-c2cc[nH+]o2)cc1	c1ccc(-c2ccno2)cc1	mol6736	c1ccc(-c2ccno2)cc1