pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.58	OCHEM	0	-1	O=C(O)C=C[N+](=O)[O-]	O=C([O-])C=C[N+](=O)[O-]	mol33045	O=C(O)C=C[N+](=O)[O-]