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The structure of a new triterpene acid from the roots of Bryonia dioica is shown on the basis of chemical and spectroscopic evidence to be 3α-hydroxy-multiflora-7,9(11)-dien-29α-oic acid. This is the first report of a naturally occurring Δ7,9(11) -multiflorene compound. 相似文献
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The free, esterified and glycosylated sterols and the pentacyclic triterpene esters of developing Sorghum bicolor grains were analysed by GLC and GC-MS. All the pentacyclic triterpenes were completely esterified but were not detected until 24 days after anthesis. Lupanol, multiflorenol, α-amyrin and isoarborinol were identified in the mature grains as components of the triterpene fraction but no 4,4-dimethylsterols could be found at any stage of development. A sixfold increase in total sterol per grain occurred during development. At 8 days after anthesis, 28-isofucosterol was found to be the second most abundant steryl ester. Campesterol was the major steryl glycoside and obtusifoliol was the major 4-monomethylsterol. 相似文献
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Isomultiflorenol was the major component accompanied by its Δ17-isomer, multiflorenol, in the triterpene alcohol fractions of the unsaponifiable 相似文献
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