pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.5	IUPAC digitized pKa	-1	-2	O=[N+]([O-])c1ccc(OP(=O)([O-])O)c([N+](=O)[O-])c1	O=[N+]([O-])c1ccc(OP(=O)([O-])[O-])c([N+](=O)[O-])c1	mol9880	O=[N+]([O-])c1ccc(OP(=O)(O)O)c([N+](=O)[O-])c1