pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
8.15	IUPAC digitized pKa	1	0	O=C1CNC2=[NH+]CCCN12	O=C1CNC2=NCCCN12	mol7991	O=C1CNC2=NCCCN12