pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
-0.68	IUPAC digitized pKa	1	0	COC(=O)c1nccc[nH+]1	COC(=O)c1ncccn1	mol4209	COC(=O)c1ncccn1
-0.68000001	OCHEM	1	0	COC(=O)c1nccc[nH+]1	COC(=O)c1ncccn1	mol4209	COC(=O)c1ncccn1