pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
3.74	IUPAC digitized pKa	0	-1	O=C(O)/C=C/I	O=C([O-])/C=C/I	mol9007	O=C(O)/C=C/I
3.526666667	AttenGpKa training set	0	-1	O=C(O)/C=C/I	O=C([O-])/C=C/I	mol9007	O=C(O)/C=C/I