pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
9.6	IUPAC digitized pKa	0	-1	C[C@H]1CC=C(O)C1=O	C[C@H]1CC=C([O-])C1=O,C[C@H]1[CH-]C=C(O)C1=O	mol9551	CC1CC=C(O)C1=O