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Labdane-type diterpene dialdehyde, pungent principle of myoga, Zingiber mioga Roscoe
Masako Abe1, Yoshio Ozawa, Yasushi Uda
1Department of Health and Nutrition, Takasaki University of Health and Welfare, Takasaki 370-0033, Japan.
Bioscience, Biotechnology, and Biochemistry
|February 25, 2003
Abstract:
The pungent principle of myoga (Zingiber mioga Roscoe) was identified as (E)-8beta(17)-epoxylabd-12-ene-15,16-dial (miogadial) on the basis of its physical and spectroscopic properties (MS, NMR, IR, and UV). Galanal A and B, isolated as well as miogadial, had no hot taste. Reduced miogadial also was tasteless. The pungency of miogadial depended on the presence of alphabeta-unsaturated-1,4-dialdehyde group.