pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
5.75	AttenGpKa training set	0	-1	O=C/C=C/C=C/O	O=C/C=C/C=C/[O-]	mol31091	O=C/C=C/C=C/O