pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.5	Datawarrior	0	-1	O=C(O)CC(=O)/C=N/O	O=C([O-])CC(=O)/C=N/O	mol13503	O=C(O)CC(=O)/C=N/O
8.7	Datawarrior	-1	-2	O=C([O-])CC(=O)/C=N/O	O=C([O-])CC(=O)/C=N/[O-]	mol13503	O=C(O)CC(=O)/C=N/O