pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.1	IUPAC digitized pKa	0	-1	O=C(O)/C=C\c1ccc(O)cc1O	O=C([O-])/C=C\c1ccc(O)cc1O	mol10851	O=C(O)/C=C\c1ccc(O)cc1O