pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.50999999046326	QSARToolbox	0	-1	CCCS(=O)(=O)CCC(=O)O	CCCS(=O)(=O)CCC(=O)[O-]	mol34368	CCCS(=O)(=O)CCC(=O)O