<i>Stevia rebaudiana</i> Moritaの葉から抽出した新規ステビオール配糖体の解析

DOI 日本農学文献記事索引 Web Site Web Site 被引用文献3件 参考文献40件

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  • Characterization of Novel Steviol Glycosides from Leaves of Stevia rebaudiana Morita

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Stevia rebaudiana Morita, which produces a higher ratio of rebaudioside A relative to stevioside, was developed as a cultivar by selective breeding of S. rebaudiana Bertoni. The structures of 21 compounds (termed SG1-20) extracted from the leaves with hot water were characterized by ESI-MS/MS, 1H- and 13C-NMR and/or chemical analyses after separation by HPLC on an Amide-80 column. Among them, ten compounds (about 7% of the total) were found to be new steviol glycosides that contained the following sugar chains linked at C13 (R2) and C19 (R1) of the aglycon steviol. SG4: R1 = H-, R2 = Rhaα1-2(Glcβ1-3)Glcβ1-; SG7: R1 = Glcβ1-, R2 = Glcβ1-3Glcβ1-; SG12: R1 = Glcβ1-3Glcβ1-, R2 = Glcβ1-2(Glcβ1-3)Glcβ1-; SG14: R1 = Glcβ1-, R2 = Glcβ1-3Rhaα1-2(Glcβ1-3)Glcβ1-; SG15: R1 = Glcβ1-, R2 = Glcβ1-6Glcβ1-2(Glcβ1-3)Glcβ1-; SG16-I: R1 = Glcβ1-2Glcβ1-, R2 = Rhaα1-2(Glcβ1-3)Glcβ1-; SG16-II: R1 = Rhaα1-2Glcβ1-, R2 = Glcβ1-2(Glcβ1-3)Glcβ1-; SG17: R1 =, R2 = Glcβ1-2(Glcβ1-3)Glcβ1-; SG19: R1 = Rhaα1-2(Glcβ1-3)Glcβ1-, R2 = Glcβ1-2(Glcβ1-3)Glcβ1-; SG20: R1 = Glcβ1-3Rhaα1-2(Glcβ1-3)Glcβ1-, R2 = Glcβ1-2(Glcβ1-3)Glcβ-. Eleven compounds were previously known steviol glycosides, among which rebaudioside A (61.6% of total), stevioside (9.2%) and rebaudioside C (7.5%) were predominant.

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