pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
12.8	IUPAC digitized pKa	0	-1	CC(C)COO	CC(C)CO[O-]	mol9140	CC(C)COO
12.8000001907349	QSARToolbox	0	-1	CC(C)COO	CC(C)CO[O-]	mol9140	CC(C)COO