Labdane-type diterpene dialdehyde,pungent principle of myoga,Zingiber mioga Roscoe |
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| Authors: | Abe Masako Ozawa Yoshio Uda Yasushi Yamada Yoichi Morimitsu Yasujiro Nakamura Yoshimasa Osawa Toshihiko |
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| Institution: | Department of Health and Nutrition, Takasaki University of Health and Welfare, Takasaki 370-0033, Japan. |
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| 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. |
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