n-Octyl .ALPHA.-L-Rhamnopyranosyl-(1.RAR.2)-.BETA.-D-glucopyranoside Derivatives from the Glandular Trichome Exudate of Geranium carolinianum
作者:Teigo Asai、Takaomi Sakai、Kiyoshi Ohyama、Yoshinori Fujimoto
DOI:10.1248/cpb.59.747
日期:——
Chemical investigation of the glandular trichome exudate from Geranium carolinianum L. (Geraniaceae) led to the characterization of unique disaccharide derivatives, n-octyl 4-O-isobutyryl-α-L-rhamnopyranosyl-(1→2)-6-O-isobutyryl-β-D-glucopyranoside (1), n-octyl 4-O-isobutyryl-α-L-rhamnopyranosyl-(1→2)-6-O-(2-methylbutyryl)-β-D-glucopyranoside (2) and n-octyl 4-O-(2-methylbutyryl)-α-L-rhamnopyranosyl-(1→2)-6-O-isobutyryl-β-D-glucopyranoside (3), named caroliniasides A—C, respectively. These structures were determined by spectral means. n-Alkyl glycoside derivatives have been isolated from the glandular trichome exudates for the first time. This rare type of secondary metabolites could be applicable to chemotaxonomic perspective because they are found in glandular trichome exudates of plants belonging to the genus Geranium, according to our studies.
对 Geranium carolinianum L.(迷迭香科植物)的腺毛状渗出物进行化学研究后,鉴定出了独特的二糖衍生物:正辛基 4-O-异丁酰-α-<小>L小>-鼠李糖。(Geraniaceae)的腺毛渗出物进行了化学研究,结果发现了一种独特的二糖衍生物:正辛基 4-O-异丁酰基-α-<小>L小>-鼠李糖基-(1→2)-6-O-异丁酰基-β-<小>D小>-吡喃葡萄糖苷 (1)、正辛基 4-O-异丁酰基-α-<小>L小>-吡喃鼠李糖基-(1→2)-6-O-(2-甲基丁酰基)-β-<小>D小>-吡喃葡萄糖苷(2)和正辛基 4-O-(2-甲基丁酰基)-β-<小>D小>-吡喃葡萄糖苷(3)。辛基 4-O-(2-甲基丁酰基)-α-<小>L小>-吡喃鼠李糖基-(1→2)-6-O-异丁酰基-β-<小>D小>-吡喃葡萄糖苷 (3)、分别命名为 caroliniasides A-C。这是首次从腺毛渗出物中分离出 n-烷基糖苷衍生物。根据我们的研究,天竺葵属植物的腺毛体渗出物中也发现了这种罕见的次级代谢物,因此可以从化学分类学的角度对其进行研究。