pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
5.24	IUPAC digitized pKa	0	-1	O=C(O)CCC(CCC(=O)O)[N+](=O)[O-]	O=C([O-])CCC(CCC(=O)O)[N+](=O)[O-]	mol10242	O=C(O)CCC(CCC(=O)O)[N+](=O)[O-]
4.0	IUPAC digitized pKa	-1	-2	O=C([O-])CCC(CCC(=O)O)[N+](=O)[O-]	O=C([O-])CCC(CCC(=O)[O-])[N+](=O)[O-]	mol10242	O=C(O)CCC(CCC(=O)O)[N+](=O)[O-]