Reference:
Sonntag, Tessa; Kunert, Christof; Dunkel, Andreas; Hofmann, Thomas Sensory-Guided Identification of N-(1-Methyl-4-oxoimidazolidin-2-ylidene)-α-amino Acids as Contributors to the Thick-Sour and Mouth-Drying Orosensation of Stewed Beef Juice, 2010/05/26, DOI: 10.1021/jf100591c