pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.1	IUPAC digitized pKa	1	0	CC1(C)C(=O)N[NH+]=C1N	CC1(C)C(=O)NN=C1N	mol4002	CC1(C)C(=O)NN=C1N
2.09999990463257	QSARToolbox	1	0	CC1(C)C(=O)N[NH+]=C1N	CC1(C)C(=O)NN=C1N	mol4002	CC1(C)C(=O)NN=C1N