Martín-Ramos, P. Carrión-Prieto, P. Silva-Castro, I. Ruiz-Potosme, N. Hernández-Navarro, S. Martín-Gil, J. On the probable composition of ‘Jamaican stone’ aphrodisiac Phytochemistry Letters 10.1016/j.phytol.2016.11.005 2017 2017