senkirkine/senecio

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The nature of intramolecular N--C equals O interactions. Crystal structure of the Senecio alkaloid senkirkine.

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ALKALOIDS OF NEW ZEALAND SENECIO SPECIES. II. SENKIRKINE.

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Neosenkirkine and Senkirkine from Senecio pierotii.

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Diversity of pyrrolizidine alkaloids in native and invasive Senecio pterophorus (Asteraceae): implications for toxicity.

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Changes in plant chemical defenses after invasion could have consequences on the invaded ecosystems by modifying the interactions between plants and herbivores and facilitating invasion success. However, no comprehensive biogeographical studies have yet determined the phenotypic levels of plant

Pyrrolizidine alkaloids as oviposition stimulants for the cinnabar moth, Tyria jacobaeae.

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In choice experiments with artificial leaves, we tested related pyrrolizidine alkaloids (PAs) for their stimulatory effects on the oviposition of the cinnabar moth, a specialist on the PA-containing plant Senecio jacobaea. The PAs from S. jacobaea that we tested stimulated oviposition. Monocrotaline

Toxicity of pyrrolizidine alkaloids to Spodoptera exigua using insect cell lines and injection bioassays.

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Pyrrolizidine alkaloids (PAs) are feeding deterrents and toxic compounds to generalist herbivores. Among the PAs of Jacobaea vulgaris Gaertn, jacobine and erucifoline are the most effective against insect herbivores as indicated by correlative studies. Because little is known about the effect of

[Studies on the alkaloids of Senecio scandens growing in Guangdong].

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OBJECTIVE To study alkaloids of Senecio scandens growing in Guangdong. METHODS The rapid resolution liquid chromatography-electrospray ionization mass spectrometry (RRLC-ESI-MS/MS) was used to analyse alkaloids of Senecio scandens growing in Guangdong, and senkirkine was isolated and purified by

Identification of five hepatotoxic pyrrolizidine alkaloids in a commonly used traditional Chinese medicinal herb, Herba Senecionis scandentis (Qianliguang).

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Senecio scandens Buch.-Ham is a plant source for a commonly used traditional Chinese medicinal (TCM) herb Qianliguang. A TCM herbal proprietary product containing Qianliguang as the major herb for the treatment of sinusitis has been used in China for several decades, and has also been exported to

Three new monoterpene glucosides from Senecio solidagineus.

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Three new monoterpene glucosides, solidagin A, B, and C (1-3), together with two known alkaloids, senecionine (4) and senkirkine (5), were isolated from Senecio solidagineus, and their structures were elucidated on the basis of 1D and 2D NMR spectral analysis.

Alkaloid patterns and biosynthetic capacity of root cultures from some pyrrolizidine alkaloid producing Senecio species.

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Root cultures of Senecio vulgaris, S. vernalis, S. erucifolius and S. squalidus were established. The patterns of pyrrolizidine alkaloids found in these root cultures were analyzed by high-resolution GC and GC-MS and compared with the alkaloids present in the respective plants. In vitro cultured

Stability of pyrrolizidine alkaloids from Senecio vernalis in grass silage under different ensilage conditions.

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BACKGROUND

This study evaluated the degradation of pyrrolizidine alkaloids (PAs) from eastern groundsel (Senecio vernalis) in grass silage prepared with different inoculants. Silages were produced from ryegrass with 230 g kg^-1 dry matter (DM) content and mixed with

Toxicity of Senecio vernalis to laying hens and evaluation of residues in eggs.

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Diets with 0.0, 0.5,2.0, or 4.0% ground-aerIal parts of Senecio vernalis were fed to groups of 10 laying hens for 210 d. Plant alkaloid content was 0.14% with 8.57% in the basic form and 91.43% in the N-oxide form. Specific alkaloids were senecionin (66.65%), senecivernin (10.37%), seneciphylline

[On the gas-chromatographical determination of the pyrrolizidine alkaloids of some Senecio-species].

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A gas-chromatographical method is described on which seven pyrrolizidine alkaloids (Fuchsisenecionine, Senecionine, Senecivernine, Senkirkine, Retrorsine, O (7)-Angelylheliotridine and Heliotrine) are determinated in a qualitative way and their ratio of concentration in Senecio fuchsii, vernalis,

Analysis of pyrrolizidine alkaloids and evaluation of some biological activities of Algerian Senecio delphinifolius (Asteraceae).

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Although Senecio species are known as sources of potentially toxic pyrrolizidine alkaloids (PAs), some species of this genus are traditionally used as remedies, notably in Algeria. In this paper, the evaluation of biological activities and the analysis of PAs of Algerian specimens of Senecio

Macrocyclic pyrrolizidine alkaloids from Senecio anonymus. Separation of a complex alkaloid extract using droplet counter-current chromatography.

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Ten 12-membered macrocyclic pyrrolizidine alkaloids, all of them esters of the necines, retronecine or otonecine, have been isolated from Senecio anonymus. The separation, carried out by droplet counter-current chromatography, afforded senecionine [1], integerrimine [2], retrorsine [3], senkirkine

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