pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.21999979019165	QSARToolbox	0	-1	O=C(O)CCC(=O)CCC(=O)O	O=C([O-])CCC(=O)CCC(=O)O	mol33799	O=C(O)CCC(=O)CCC(=O)O