Results 71 to 80 of about 253,123 (156)
Molecules, 2019 Previous studies have shown that pollen products sold as nutritional supplements and used in apitherapy may contain toxic pyrrolizidine alkaloids (PAs) if bees collect pollen from PA-containing plants, such as Echium vulgare. In this study, the botanical
C. Kast +4 more
semanticscholar +1 more source
European Journal of Organic Chemistry, Volume 29, Issue 24, 23 June 2026.Chiral tri‐ and pentahydroxy spirocyclopentane‐indolizidines were synthesized using lithium diisopropylamide “LDA” promoted diallylation and tetrahydrofuran “THF” ring‐opening in a one‐pot procedure as a key step. The sequence leading to the targeted hydroxy‐spiroindolizidines was achieved by cis‐dihydroxylation followed by reduction of the enamine and
Paula Fraňová +6 more
wiley +1 more source
PHYTOCHEMICAL STUDY OF CROTALARIA THEBAICA (DEL.) DC. GROWING IN EGYPT [PDF]
Bulletin of Pharmaceutical Sciences. Assiut University, 1990 From the chloroformic extract of Crotalaria thebaica (Del.)Dc. herb, three pyrrolizidine alkaloids, Spectabiline, Monocrotaline and Crosemperine as well as b-sitosterol glycoside and daidzein were isolated.
K. Takeya +5 more
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Revista Brasileira de Farmacognosia, 2019 Workflows based on gas and liquid chromatography coupled to mass spectrometry for the identification of toxic pyrrolizidine alkaloids present in plants were developed and applied to Echium plantagineum L., Boraginaceae, extracts.
A. Sixto +3 more
semanticscholar +1 more source
Environmental and Molecular Mutagenesis, Volume 67, Issue 5-7, June‐August 2026.ABSTRACT There is growing interest in in vitro‐based new approach methodologies (NAMs) for assessing genotoxicity. These approaches are desirable for industries like cosmetics which are prohibited from animal testing due to regulatory restrictions, as well as “3R” considerations to avoid in vivo testing.
Ashley Allemang, Stefan Pfuhler
wiley +1 more source
Evaluation of sunn hemp performance and nutritive value in Maine, USA
Grassland Research, Volume 5, Issue 2, Page 112-118, June 2026.Abstract Background Sunn hemp (Crotalaria juncea L. and Crotalaria ochroleuca G. Don) was evaluated as a warm‐season legume to mitigate the “summer slump” in Maine's forage production caused by heat and moisture deficit stress. Methods This study compared three cultivars: “Crescent Sunn,” “Loei,” and “Red Mini,” at 60 and 90 days after seeding over the
Jaime Garzon, Edgar Cardenas
wiley +1 more source
Presença de alcalóides pirrolizidinicos em Ageratum conyzoides L., Asteraceae [PDF]
, 2013 Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde. Programa de Pós-graduação em FarmáciaAgeratum conyzoides L. é conhecida popularmente como "mentrasto" e pertence à família Asteraceae.
Bosi, Cristiane Fracari
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Is the endophyte‐based plant protection against aphids mediated by changes in the insect microbiome?
Insect Science, Volume 33, Issue 3, Page 1097-1108, June 2026.We showed that the fungal endophyte Epichloë strain AR37 increased the plant resistance against aphids via the production of indole diterpene alkaloids. The reduction in aphid performance was not associated with changes in abundance/composition/diversity of the insect's bacterial microbiota, but additional endophyte effects on this microbiota cannot be
Daniel A. Bastías +5 more
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Pyrrolizidine alkaloids: Hepatic metabolism and extrahepatic toxicity
, 1994 Pyrrolizidine alkaloids are proposed to be metabolized in the liver to reactive pyrrole species, or dehydroalkaloids. These reactive pyrroles are hypothesized to be responsible for pyrrolizidine alkaloid toxicity.
Wild, Stacie Lynn.
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Supinidine Viridiflorates from the Roots of
Natural Product Communications, 2013 The alkaloid extract from the roots of Chromolaena pulchella provided two new pyrrolizidine alkaloids, elucidated as (-)-supinidine triviridiflorate ( 1 ) and (-)-supinidine diviridiflorate ( 2 ) based on their physical and spectroscopic properties ...
Mario A. Gómez-Hurtado +7 more
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