pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.42	IUPAC digitized pKa	0	-1	O=C(O)/C=C\I	O=C([O-])/C=C\I	mol9008	O=C(O)/C=C\I