pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
2.88	IUPAC digitized pKa	0	-1	O=C(O)c1cn(-c2ccccc2)nn1	O=C([O-])c1cn(-c2ccccc2)nn1	mol10950	O=C(O)c1cn(-c2ccccc2)nn1