pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.97	IUPAC digitized pKa	0	-1	O=C(O)COCCOCC(=O)O	O=C([O-])COCCOCC(=O)O	mol9589	O=C(O)COCCOCC(=O)O
3.02999997138977	QSARToolbox	0	-1	O=C(O)COCCOCC(=O)O	O=C([O-])COCCOCC(=O)O	mol9589	O=C(O)COCCOCC(=O)O
3.15	IUPAC digitized pKa	-1	-2	O=C([O-])COCCOCC(=O)O	O=C([O-])COCCOCC(=O)[O-]	mol9589	O=C(O)COCCOCC(=O)O