pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
9.9	IUPAC digitized pKa	1	0	c1ccc(C2=[NH+]CCN2)cc1	c1ccc(C2=NCCN2)cc1	mol6716	c1ccc(C2=NCCN2)cc1