pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
4.85	AttenGpKa training set	-1	-2	O=P([O-])(O)OO	O=P([O-])([O-])OO	mol31349	O=P(O)(O)OO