pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.98000001907349	QSARToolbox	0	-1	O=C(O)COCC(COCC(=O)O)(COCC(=O)O)COCC(=O)O	O=C([O-])COCC(COCC(=O)O)(COCC(=O)O)COCC(=O)O	mol36184	O=C(O)COCC(COCC(=O)O)(COCC(=O)O)COCC(=O)O