Quercus属植物の成分研究(第5報)日本産カシ類のパラフィン, トリテルペンについて

概要

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The normal paraffins and triterpenes contained in the leaves of seven kinds of Quercus spp. (Q. stenophylla MAKINO, Q. myrsinaefolia BLUME, Q. glauca THUNB., and Q. gilva BLUME, Q. sessilifolia BLUME, Q. acuta THUNB., and Q. phillyracoides A. GRAY) were studied systematically. The normal paraffins in each plant consisted of the same heptacosane (C_<27>), nonacosane (C_<29>), hentriacontane (C_<31>), and tritriacontane (C_<33>). The ratio of normal paraffin components was similar in closely related plants. As a triterpene, eight known compounds (friedlin, epi-friedlanol, friedelanol, taraxerol, lupeol, β-amyrin, β-amyrin acetate, and friedelanol acetate) and three unidentified compounds (triterpene D-7,mp 244-245°, from Q. gilva BLUME, triterpene D-20,mp 212-215°, from Q. gilva BLUME, and triterpene E-6,mp 135°, from Q. glauca THUNB.) were isolated. Friedelin and epi-friedelanol were contained in all the plants, and lupeol was present in most of the plants. Especially, a large amount of friedelin was isolated from Q. stenophylla MAKINO. Lupeol was contained in a large quantity in Q. phillyracoides A. GRAY. The component of the white waxy compound, secreted on the back of leaves of Q. stenophylla MAKINO, was examined and the substance was almost entirely a mixture of wax and triterpenes. The principal ingredient of triterpenes was friedelin, same as in the extract of leaves.
社団法人日本薬学会の論文
1976-10-25