pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
1.5	IUPAC digitized pKa	0	-1	O=C(O)c1cc(=O)cco1	O=C([O-])c1cc(=O)cco1	mol9526	O=C(O)c1cc(=O)cco1