pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.6	OCHEM	0	-1	NC(=O)CCCC(=O)O	NC(=O)CCCC(=O)[O-]	mol22248	NC(=O)CCCC(=O)O
4.59999990463257	QSARToolbox	0	-1	NC(=O)CCCC(=O)O	NC(=O)CCCC(=O)[O-]	mol22248	NC(=O)CCCC(=O)O