Results 241 to 250 of about 36,442 (301)

Correction: New acetogenin katsuurallene from Laurencia saitoi collected from Katsuura, Japan. [PDF]

Nat Prod Bioprospect
Minamida Y, Matsuura H, Ishii T, Miyagi M, Shinjo Y, Sato K, Kamada T, Mihara Y, Togashi I, Sugimoto K, Abe T, Kikuchi N, Suzuki M.   +12 more
europepmc   +1 more source

Co-expression of squalene epoxidases with triterpene cyclases boosts production of triterpenoids in plants and yeast

Metabolic Engineering, 2018
Triterpene cyclases catalyze the first committed step in triterpene biosynthesis, by forming mono- to pentacyclic backbone structures from oxygenated C30 isoprenoid precursors.
Lemeng Dong, Jacob Pollier, Jean-Etienne Bassard   +2 more
exaly   +2 more sources

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Triterpenes and a triterpene glucoside from Dysoxylum cumingianum

Phytochemistry, 2011
Six triterpenes and a triterpene glucoside were isolated from the MeOH extract of the leaves of Dysoxylum cumingianum together with three known triterpenes. Their structures were elucidated by extensive spectroscopic analyses. In cytotoxicity assays against three human cancer cell lines, including a multi-drug resistant cancer cell line (KB-C2 ...
Shin-ichiro, Kurimoto, Yoshiki, Kashiwada, Kuo-Hsiung, Lee, Yoshihisa, Takaishi   +3 more
openaire   +2 more sources

Differential Partitioning of Triterpenes and Triterpene Esters in Apple Peel

Journal of Agricultural and Food Chemistry, 2018
Apple peel is a rich source of secondary metabolites, and several studies have outlined the dietary health benefits of ursane-type triterpenes in apple. Changes in triterpene metabolism have also been associated with the development of superficial scald, a postharvest apple peel browning disorder, and postharvest applications of diphenylamine and 1 ...
Brenton C. Poirier, David A. Buchanan, David R. Rudell, James P. Mattheis   +3 more
openaire   +2 more sources

Triterpene Biosynthesis in Plants

Annual Review of Plant Biology, 2014
The triterpenes are one of the most numerous and diverse groups of plant natural products. They are complex molecules that are, for the most part, beyond the reach of chemical synthesis. Simple triterpenes are components of surface waxes and specialized membranes and may potentially act as signaling molecules, whereas complex glycosylated triterpenes ...
Ramesha Thimmappa, Katrin Geisler, Thomas Louveau, Paul OMaille, Anne Osbourn   +4 more
openaire   +2 more sources

Triterpenes and triterpene glycosides from Paradrymonia macrophylla

Phytochemistry, 1996
Abstract Seven pentacyclic triterpenes and triterpene glycosides have been isolated from the stems and roots of Paradrymonia macrophylla and their structures elucidated by means of 1H and 13C NMR spectroscopy. Three of them are described for the first time as natural products, namely: 2α,3β,19α-trihydroxy-24-oxo-urs-12-en-28-oic acid (24-epi ...
Christian Terreaux, Marc P. Maillard, Mahabir P. Gupta, Kurt Hostettmann   +3 more
openaire   +1 more source

A Reinvestigation of Maprounea Triterpenes

Journal of Natural Products, 1995
Anti-HIV activity and the inhibition of phorbol ester receptor binding activity in two species of Maprounea were traced to small amounts of highly potent phorbol esters of the daphnane type. The triterpenes previously isolated from this genus were found to be devoid of biological activity when scrupulously purified.
J A, Beutler, Y, Kashman, M, Tischler, J H, Cardellina, G N, Gray, M J, Currens, M E, Wall, M C, Wani, M R, Boyd   +8 more
openaire   +2 more sources

Triterpene und Triterpen-Saponine

1955
Triterpene sind Naturstoffe mit 30 C-Atomen. Der Aufbau ihres Molekuls folgt der „Isoprenregel“, d. h. das Kohlenstoffskelet last sich in 6-Isoprenreste zerlegen (s. die Formeln I, III, IV, V). Die Mannigfaltigkeit der Korperklasse wird durch die Abanderungen des Kohlenstoffskelets, durch Zahl und Stellung der Doppelbindungen und der ...
M. Steiner, H. Holtzem
openaire   +1 more source

Triterpenes and triterpene glycosides from the leaves of Ilex rotunda

Phytochemistry, 1993
Abstract Two new triterpenes, ilexolic acid A and B, and seven new saponins, ilexosides XXXIII–XXXIX, together with the known saponin rotungenoside were isolated from the fresh leaves of Ilex rotunda , and their structures elucidated on the basis of chemical and physicochemical evidence.
Kayoko Amimoto, Kazuko Yoshikawa, Shigenobu Arihara   +2 more
openaire   +1 more source