pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
9.14	IUPAC digitized pKa	0	-1	O=C1CCC=C1O	O=C1CCC=C1[O-],O=C1C[CH-]C=C1O	mol9305	O=C1CCC=C1O