Journal ArticleDOI
A defense alkaloid in a carnivorous beetle
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This article is published in Cellular and Molecular Life Sciences.The article was published on 1971-12-01. It has received 56 citations till now.read more
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Alkaloids from amphibian skin: a tabulation of over eight-hundred compounds.
TL;DR: Although only a few of the over 800 amphibian skin alkaloids have been detected in arthropods, putative arthropod sources for the batrachotoxins and coccinelline-like tricyclics (beetles), the pumiliotoxin (ants, mites), the decahydroquinolines, izidine, pyrrolidines, and piperidines (ants), and the spirop
Journal ArticleDOI
Review of the defensive chemistry of coccinellids
TL;DR: I. Other Chemical Defense Mechanisms 1120 A. Pyrrolizidine Alkaloid Sequestration 1120 B. Methoxyalkylpyrazines as Warning Odorants 1121 D. Cardenolides 1121 E. Unidentified Defensive Agents 1121 XI.
Journal ArticleDOI
A Formal [3 + 3] Cycloaddition Approach to Natural-Product Synthesis
TL;DR: In this paper, a formal [3 + 3] cycloaddition strategy for constructing complex heterocycles is reviewed, which involves condensation of α,β-unsaturated iminium salts with 1,3-dicarbonyl equivalents.
Journal ArticleDOI
Distribution et activités des alcaloïdes défensifs des Coccinellidae
Jacques M. Pasteels,C. Deroe,Bernard Tursch,Jean Claude Braekman,Désiré Daloze,Claude Hootele +5 more
TL;DR: From a survey of 30 species and varieties of ladybugs the presence of alkaloid appears to be correlated with the existence of aposematic colour and not with being carnivorous or phytophagous, but all the beetles containing alkaloids do not possess the same degree of protection.
Journal ArticleDOI
Ladybird defence alkaloids: Structural, chemotaxonomic and biosynthetic aspects (Col.: Coccinellidae)
TL;DR: The defensive mechanisms which protect ladybird beetles (Coccinellidae) against predators are reviewed, and particular emphasis is laid on the repellent alkaloids which are contained in the haemolymph of many species.
References
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Hemorrhage in a Coccinellid Beetle and Its Repellent Effect on Ants
George M. Happ,Thomas Eisner +1 more
TL;DR: Special refinements of the bleeding mechanism of the Mexican bean beetle are described, and the defensive effectiveness of the mechanism against ants is demonstrated, suggesting that Ants may have provided a major selective force in the evolution of this mechanism.
Journal ArticleDOI
An infrared study of trimethylamine oxide, its hydrate, and its hydrochloride
Paul A. Giguère,David Chin +1 more
TL;DR: The infrared spectra of trimethylamine oxide, its hydrate, and its hydrochloride in the solid state were measured over the range 300 to 3500 cm−1 to ascertain the nature of the bonds in these compo...
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Hemorrhage in a Coccinellid Beetle and Its Repellent Effect on Ants
George M. Happ,Thomas Eisner +1 more