pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
5.7	IUPAC digitized pKa	1	0	C1=Cc2[nH+]cccc2C1	C1=Cc2ncccc2C1	mol7717	C1=Cc2ncccc2C1