pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
13.5	Datawarrior	-2	-3	[O-][N+]([O-])=C([CH-]O)CO	[O-][CH-]C(CO)=[N+]([O-])[O-],[O-][N+]([O-])=C([CH-]O)[CH-]O	mol12484	[O-][N+]([O-])=C(CO)CO