4 Jomita H, Nogvchi M, Tamaki E. Chemical studies on pos-hive compounds in cured tobacco leaves III -Further isola-tion and identification of some amino acid-sugar com-pounds [J]. Agr Biol Chem,1965,29 :959-961
[5]
5 Kato H. Chemical studies on amino-carbonyl reacaions III-Formation of substituted pyrrole-2-aldehydes by reacaionof aldoses with alkylamines[J]. Agr Biol Chem,1967,31:10R6-1096.
[6]
6 Kato H,Fujimaki M. Formation of 1-alkyl-s-(hydroxym-ethyl)-pyrrole-2-aldehydes in the browning reacaion be-tween hexoses and alkylamines [J]. Agr Bid Chem,1970, 34:1071-1077