茗荷儿中的一种新型辛辣成分——茗荷辣素及其辛辣度的定量评估

Mioganal, a novel pungent principle in myoga (Zingiber mioga Roscoe) and a quantitative evaluation of its pungency.

作者信息

Abe Masako, Ozawa Yoshio, Morimitsu Yasujiro, Kubota Kikue

机构信息

Department of Health and Nutrition, Takasaki University of Health and Welfare, Gunma, Japan.

出版信息

Biosci Biotechnol Biochem. 2008 Oct;72(10):2681-6. doi: 10.1271/bbb.80347. Epub 2008 Oct 7.

DOI:10.1271/bbb.80347

PMID:18838802

Abstract

We isolated a novel pungent principle from the flower buds of myoga. Based on an interpretation of the HR-MS, EI-MS, IR, UV, and NMR data, this compound was (8betaH)-14,17-cyclolabda-12,14(17)-diene-15,16-dial (mioganal, 1). We determined the threshold value of mioganal to be 5.6x10(-5) g/ml, which is about eight times greater than that of 8beta(17)-epoxy-12(E)labdene-15,16-dial (miogadial), the main pungent principle in the flower buds of myoga. In addition, we examined the content of mioganal in different parts of different varieties. Mioganal is mainly distributed in the leaves of both natsumyoga and akimyoga varieties at 1.60 mg/100 g fresh weight on average, its amount being three times higher than that in the flower buds.

摘要

我们从茗荷的花蕾中分离出一种新的辛辣成分。基于对高分辨质谱（HR-MS）、电子轰击质谱（EI-MS）、红外光谱（IR）、紫外光谱（UV）和核磁共振谱（NMR）数据的解析，该化合物为(8βH)-14,17-环拉布达-12,14(17)-二烯-15,16-二醛（茗荷醛，1）。我们测定茗荷醛的阈值为5.6×10⁻⁵ g/ml，约为8β(17)-环氧-12(E)-拉布烯-15,16-二醛（茗荷二醇）的八倍，茗荷二醇是茗荷花蕾中的主要辛辣成分。此外，我们检测了不同品种不同部位中茗荷醛的含量。茗荷醛主要分布在夏茗荷和秋茗荷品种的叶片中，平均鲜重为1.60 mg/100 g，其含量比花蕾中的高三倍。