Imre Blank, Jianming Lin, Rene Fumeaux, Dieter H. Welti, Laurent B. Fay: "Formation of 3-Hydroxy-4,5-dimethyl-2(5H)-furanone (Sotolone) from 4-Hydroxy-l-isoleucine and 3-amino-4,5-dimethyl-3,4-dihydro-2(5H)-furanone". J. Agric. Food Chem. , 1996 , 44 (7), pp 1851–1856. DOI:10.1021/jf9506702