pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
5.35	IUPAC digitized pKa	-1	-2	O=C([O-])CCC([N+](=O)[O-])[N+](=O)[O-]	O=C([O-])CC[C-]([N+](=O)[O-])[N+](=O)[O-]	mol9202	O=C(O)CCC([N+](=O)[O-])[N+](=O)[O-]