pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
-3.18	IUPAC digitized pKa	1	0	c1ccc(-c2cco[nH+]2)cc1	c1ccc(-c2ccon2)cc1	mol6735	c1ccc(-c2ccon2)cc1