pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.91	IUPAC digitized pKa	1	0	Cc1c[nH][nH+]c1C	Cc1c[nH]nc1C	mol6881	Cc1c[nH]nc1C