Results 191 to 200 of about 1,858 (240)
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Cembrane Diterpenes from the Gorgonian Leptogorgia laxa
Journal of Natural Products, 2008The new cembrane diterpenes leptodienone A (2) and leptodienone B (3) and the known compounds lopholide, lophodiol B, lophodione, and lophotoxin (1) have been isolated from the gorgonian Leptogorgia laxa collected in the Gulf of California. The structures of the new metabolites have been established by spectroscopic techniques.
María J. Ortega +3 more
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Bioactive Cembrane Diterpenoids of Anisomeles indica
Journal of Natural Products, 2008Five new cembrane-type diterpenoids with a trans-fused alpha-methylene-gamma-lactone (1-5), a new flavonoid glucoside (6), and 17 known compounds were isolated from a methanol extract of Anisomeles indica. The structures of 1-6 were elucidated by spectroscopic analysis, and the absolute configuration of compound 1 was determined using the modified ...
Yu Li Chen +9 more
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Intermediates in the Synthesis of Cembrane Diterpenes. I
Acta Crystallographica Section C Crystal Structure Communications, 1997The molecular structure of rac-(1R,2R,3S,7S)-3-hydroxy-5-isopropyl-2-methyltricyclo[8.4.0.0 2,7 ]tetradeca-4,9-dien-6-one, C 18 H 26 O 2 , has an all-cis ring-fusion tricyclic structure, with an overall distorted hemispherical conformation (the hydroxyl group is opposite the other substituents).
F. Silva +6 more
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Cembrane-type diterpenoids from Macaranga pustulata
Fitoterapia, 2018Three new cembrane-type diterpenoids, deheiculatins M-O (1-3), together with five known analogues (4-8), were isolated from the twigs of Macaranga pustulata King ex Hook. The structures of new compounds 1-3 were elucidated by extensive spectroscopic analyses, modified Mosher's method, and the experimental and calculated electronic circular dichroism ...
Huihao Zhou +7 more
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Some new cembrane derivatives of marine origin
Tetrahedron, 1974Abstract The isolation and structural determination of several cembrane derivatives (2–7) isolated from the soft-bodied coral sarcophytum glaucum- is reported. The various compounds can be divided into cembranolids, cembranes containing the dihydrofurane moiety, and correlated alcohols. The stereochemistry at C-1, as well as that of the epoxide ring,
L. Néeman, E. Zadock, Yoel Kashman
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ChemInform Abstract: Studies on the Synthesis of Cembranes
ChemInform, 1992AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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1979
The first studies which established the structures of members of the new group of diterpenes known as cembranes appeared in 1962 when Dauben, Thiessen, and Resnick (1), and Kobayashi and Akiyoshi (2) simultaneously published the structure of the hydrocarbon cembrene (1) from pine oleoresins, and Rowland and Roberts (3) published the structure of two ...
A. J. Weinheimer +2 more
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The first studies which established the structures of members of the new group of diterpenes known as cembranes appeared in 1962 when Dauben, Thiessen, and Resnick (1), and Kobayashi and Akiyoshi (2) simultaneously published the structure of the hydrocarbon cembrene (1) from pine oleoresins, and Rowland and Roberts (3) published the structure of two ...
A. J. Weinheimer +2 more
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Cembrane-derived diterpenoid having a carbotricyclic skeleton
Phytochemistry, 1987Abstract A novel carbotricyclic diterpenoid, 18-oxo-3-virgene, has been isolated from the waxy, surface resins of tobacco.
Akio Ohnishi +4 more
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Cembrane Diterpenes Chemistry and Biological Properties
Current Organic Chemistry, 2012Cembrane-type diterpenoids are a large and structurally varied group of natural products isolated from both terrestrial and marine organisms. The present paper reviews all the metabolites of cembrane diterpenes, reported up to 2010. The natural products discussed in this review can be divided into several different structural families featuring a ...
Yonghong Liu +6 more
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Cytotoxic Cembrane Diterpenoids
2014Cembrane-type diterpenoids are a large and structurally varied group of natural products isolated from both terrestrial and marine organisms. From a biomedical perspective, cytotoxicity is the most remarkable property of this class of diterpenoids, respresented by sarcophytol A.
Yonghong Liu +4 more
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