pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.0	OCHEM	0	-1	O=C(O)Cc1ccccc1[N+](=O)[O-]	O=C([O-])Cc1ccccc1[N+](=O)[O-]	mol1278	O=C(O)Cc1ccccc1[N+](=O)[O-]
4.004	OCHEM	0	-1	O=C(O)Cc1ccccc1[N+](=O)[O-]	O=C([O-])Cc1ccccc1[N+](=O)[O-]	mol1278	O=C(O)Cc1ccccc1[N+](=O)[O-]