pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
5.9	IUPAC digitized pKa	0	-1	O=C1[C@@H]2[C@H](C(=O)N1O)[C@@H]1C=C[C@H]2C1	O=C1[C@@H]2[C@H](C(=O)N1[O-])[C@@H]1C=C[C@H]2C1	mol10984	O=C1C2C3C=CC(C3)C2C(=O)N1O