pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.4	IUPAC digitized pKa	0	-1	O=C(O)c1nc(-c2ccccc2)oc1-c1ccccc1	O=C([O-])c1nc(-c2ccccc2)oc1-c1ccccc1	mol1602	O=C(O)c1nc(-c2ccccc2)oc1-c1ccccc1