pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.63	IUPAC digitized pKa	0	-1	O=C(O)c1c(O)cccc1Cl	O=C([O-])c1c(O)cccc1Cl	mol10069	O=C(O)c1c(O)cccc1Cl
2.63000011444092	QSARToolbox	0	-1	O=C(O)c1c(O)cccc1Cl	O=C([O-])c1c(O)cccc1Cl	mol10069	O=C(O)c1c(O)cccc1Cl