Results 131 to 140 of about 14,009 (191)

DITERPENES AND DITERPENE ESTERS IN COFFEE

Food Reviews International, 2001
Coffee oil contains pentacyclic diterpenes as typical lipid constituents which have not been detected in any other foods. Major representatives are 16-O-methylcafestol, cafestol, and kahweol. Cafestol is contained in Arabica as well as in Robusta coffee. 16-O-Methylcafestol is found only in Robusta coffee.
T. Kurzrock, K. Speer
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Cembranoid diterpenes and a briarane diterpene from corals

Natural Product Research, 2006
Two new cembrane diterpenes (+)-polydactylide (1) and (+)-7alpha,8beta-dihydroxydeepoxysarcophine (2) together with (+)-sarcophine (3) and (+)-sarcophytoxide (4) have been isolated from the soft coral Sinularia polydactyla. The new cembrane diterpene (-)-7beta-hydroxy-8alpha-methoxydeepoxysarcophine (5) has been obtained from the soft coral Sarcophyton
Daniela, Grote, Hesham S M, Soliman, Kamel H, Shaker, Mohamed, Hamza, Karlheinz, Seifert   +4 more
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Diterpenes and diterpene xylosides from Conyza trihecatactis

Phytochemistry, 1993
Abstract From the leaves of Conyza trihecatactis we have isolated the labdane-type diterpenes and diterpene xylosides ent-sclareol, ent-3β-hydroxymanool, ent-manool 13-O-β- d -xylopyranoside and ent-sclareol 13-O-β- d -xylopyranoside. Structure elucidation was achieved by spectroscopic methods.
Ruben Torrenegra, Jorge Robles, Reiner Waibel, Matthias Löwel, Hans Achenbach   +4 more
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Marine diterpene glycosides

Bioorganic & Medicinal Chemistry, 2011
Marine diterpene glycosides (MDGs) respresent a small but highly significant group of the much larger class of marine diterpenes. The three well-studied examples of MDGs are eleutherobins, pseudopterosins and fuscosides, all of which exhibit extremely promising biological activity.
Fabrice, Berrué, Malcolm W B, McCulloch, Russell G, Kerr   +2 more
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Diterpene and diterpene glycosides from Rabdosia eriocalyx

Phytochemistry, 1989
Abstract An ent -kaurene diterpenoid, maoecrystal K, and its β-glucopyranoside, rabdoside 1, as well as a minor diterpene glycoside, rabdoside 2 were isolated from Rabdosia eriocalyx . The structures of the three compounds were determined by their spectral properties and chemical transformations.
Akira Isogai, Xiaoyu Shen, Kazuo Furihata, Hidetoshi Kaniwa, Handong Sun, Akinori Suzuki   +5 more
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Biotransformation of diterpenes and diterpene derivatives by Beauveria bassiana ATCC 7159

Phytochemistry, 2001
The biohydroxylation of stemodin and stemodinone by Beauveria bassiana ATCC 7159 gave exclusively 2alpha,13,18-trihydroxystemodane and 13,18-dihydroxystemodan-2-one respectively. Stemarin was converted to the novel 1beta,13,19-trihydroxystemarane and 13-hydroxystemarane-19-carboxylic acid.
G O, Buchanan, P B, Reese
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The Biosynthesis of the Diterpenes

1971
The diterpenes contain a variety of structural types and functional groups which have provided a rich source of biogenetic speculation. Over the last decade biosynthetic evidence has been accumulating to support and modify some of these speculations. It is our purpose to review some of this evidence in this chapter.
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Diterpenes and diterpene quinones from the roots of Salvia apiana

Phytochemistry, 1992
Abstract The new natural diterpenes, 6,7-didehydroferruginol, 6,7-didehydrosempervirol, 16-hydroxy-6,7-didehydroferruginol, 11,12,16-trihydroxy-20(10 → 5)abeo-abieta-1(10),6,8,11,13-pentaene, the diterpene quinones, 16-hydroxyroyleanone and 6-deoxo-5,6-didehydrolanugon Q plus the known compounds ferruginol, miltiodiol, cryptotanshinone, lanugon Q and
Antonio G. González, Zahira E. Aguiar, Teresa A. Grillo, Javier G. Luis   +3 more
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