pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.31	IUPAC digitized pKa	0	-1	O=C(O)Cc1c[nH]c(=O)[nH]c1=O	O=C([O-])Cc1c[nH]c(=O)[nH]c1=O	mol9701	O=C(O)Cc1c[nH]c(=O)[nH]c1=O
9.97	IUPAC digitized pKa	-1	-2	O=C([O-])Cc1c[nH]c(=O)[nH]c1=O	O=C([O-])Cc1c[n-]c(=O)[nH]c1=O,O=C([O-])Cc1c[nH]c(=O)[n-]c1=O	mol9701	O=C(O)Cc1c[nH]c(=O)[nH]c1=O