pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
1.71	IUPAC digitized pKa	1	0	CN1C=C(O)C=C[NH2+]1,C[NH+]1C=C(O)C=CN1	CN1C=C(O)C=CN1	mol4051	CN1C=C(O)C=CN1