pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
-5.1	AttenGpKa training set	0	-1	N#CC(C#N)C#N	N#C[C-](C#N)C#N	mol27653	N#CC(C#N)C#N