Alkaloids from Lupinus argenteus var. stenophyllus.
TLC and GLC of an alkaloid extract of the aboveground portions of Lupinus argenteus Pursh. var. stenophyllus (Rydb.) Davis (Leguminosae) suggested the presence of sparteine, beta-isosparteine, delta5-dehydrolupanine, alpha-isolupanine, lupanine, thermopsine, and anagyrine. GLC-mass spectrometry confirmed these preliminary findings. Preparative TLC was used to isolate sparteine, and this alkaloid was further characterized by IR spectral analysis and derivatization.
Toxic constituents of legume forage plants
In this review, the toxic and antinutrient compounds biosynthesized by legumes used as forage crops in the United States are described under the categories alkaloids, amino acids, cyanogens, isoflavone and coumestan estrogenic principles, nitro compounds, protease inhibitors, phytohemagglutinins, saponins, selenium compounds and tannins. The legume-related livestock conditions, bloat, locoweed poisoning and photodermatitis are also discussed. Relevant veterinary, phytochemical and toxicological literature citations are presented.
The Isolation and Identification of l-Synephrine in the Leaves and Fruit of Citrus
During a study of the relationship between trace element deficiencies and the free amino acids in citrus, an unknown basic nitrogen compound was detected in leaf extracts. In most samples there was more of the unknown constituent than of any other basic nitrogen compound. However, it was not present in leaf samples from trees with manganese deficiency. A comparison of its paper chromatographic RF values with those of many known materials suggested that it was a compound not commonly found in plants. After extraction and isolation, it was identified by degradation studies and infrared analyses as l-p-hydroxy-cr(methylaminomethyl)benzyl alcohol, (synephrine, Sympatol),