Thermodynamics of proton binding and weak (Cl−, Na + and K + ) species formation, and activity coefficients of 1,2-dimethyl-3-hydroxypyridin-4-one (deferiprone) Bretti, C.; Cigala, R.M.; Crea, F.; Lando, G.; Sammartano, S.; The Journal of Chemical Thermodynamics 2014, 77, 98-106