pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.56	IUPAC digitized pKa	0	-1	O=c1c([N+](=O)[O-])c[nH]cc1[N+](=O)[O-]	O=c1c([N+](=O)[O-])c[n-]cc1[N+](=O)[O-]	mol6444	O=c1c([N+](=O)[O-])c[nH]cc1[N+](=O)[O-]