pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
1.68	Organic Oxygen Acids and Nitrogen Bases	0	-1	O=C(O)c1c(O)cc(O)cc1O	O=C([O-])c1c(O)cc(O)cc1O	mol21746	O=C(O)c1c(O)cc(O)cc1O