Badeau M, Tikkanen MJ, Appt SE, Adlercreutz H, Clarkson TB, Hoikkala A, Wähälä K, Mikkola TS. Determination of plasma genistein fatty acid esters following administration of genistein or genistein 4'7-O-dioleate in monkeys. Biochim Biophys Acta. 2005 Dec 30; 1738(1-3):115-20.