pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
6.82	IUPAC digitized pKa	1	0	O=C1CNC2=[NH+]CCN12	O=C1CNC2=NCCN12	mol7966	O=C1CNC2=NCCN12