pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.06	IUPAC digitized pKa	0	-1	O=C(O)c1cc(Br)c[nH]1	O=C([O-])c1cc(Br)c[nH]1	mol9488	O=C(O)c1cc(Br)c[nH]1