pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
8.1	IUPAC digitized pKa	0	-1	O=C(NO)c1cnccn1	O=C(N[O-])c1cnccn1	mol9359	O=C(NO)c1cnccn1