pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.9	IUPAC digitized pKa	0	-1	C[C@@H]1C(O)=C(C=O)C(CO)=CN1C,C[C@@H]1C([O-])=C(C=O)C(CO)=C[NH+]1C	C[C@@H]1C([O-])=C(C=O)C(CO)=CN1C	mol8602	CC1C(O)=C(C=O)C(CO)=CN1C