pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.8	IUPAC digitized pKa	1	0	CC(C)[C@@H]1C(=O)N[NH+]=C1N	CC(C)[C@@H]1C(=O)NN=C1N	mol4003	CC(C)C1C(=O)NN=C1N