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Alkaloids from Eschscholzia californica and Their Capacity to Inhibit Binding of [3H]8-Hydroxy-2-(di-N-propylamino)tetralin to 5-HT1A Receptors in Vitro

AbstractA 70% ethanol extract of California poppy (Eschscholzia californica) was able to bind to 5-HT1A and 5-HT7 receptors at 100 μg/mL. The subsequent isolation procedure yielded the known alkaloids californidine (1), escholtzine (2), N-methyllaurotetanine (3), caryachine (4), and O-methylcaryachine (5), along with a new pavine alkaloid, 6S,12S-neocaryachine-7-O-methyl ether N-metho salt (7). T... READ MORE

One new and six known triterpene xylosides from Cimicifuga racemosa: FT-IR, Raman and NMR studies and DFT calculations

AbstractOne new and six known triterpene xylosides were isolated from Cimicifuga racemosa (black cohosh, Actaea racemosa). The structure of a new compound, designated as isocimipodocarpaside (1), was established to be (24S)-3β-hydroxy-24,25-oxiirane-16,23-dione-9,10-seco-9,19-cyclolanost-1(10),7(8),9(11)-trien 3-O-β-d-xylopyranoside, by means of 1H and 13C NMR, IR and Raman spectroscopies and Ma... READ MORE

Optimized analysis and quantification of glucosinolates from Camelina sativa seeds by reverse-phase liquid chromatography

AbstractGold-of-pleasure or false flax (Camelina sativa L. Crantz) is being developed as an alternative oil crop for biodiesel and for food use. The seed meal, which contains three relatively unique glucosinolates, is being evaluated for approval for use as an ingredient in animal feeds and for other uses. The objective of this research was to develop reproducible methods for the isolation of larg... READ MORE

(13)C, (15)N CPMAS NMR and GIAO DFT calculations of stereoisomeric oxindole alkaloids from Cat's Claw (Uncaria tomentosa)

AbstractOxindole alkaloids, isolated from the bark of Uncaria tomentosa [Willd. ex Schult.] Rubiaceae, are considered to be responsible for the biological activity of this herb. Five pentacyclic and two tetracyclic alkaloids were studied by solid-state NMR and theoretical GIAO DFT methods. The (13)C and (15)N CPMAS NMR spectra were recorded for mitraphylline, isomitraphylline, pteropodine (uncarin... READ MORE

New A-type Trimeric and Tetrameric Procyanidins from Peanut Skins

AbstractPeanut skins constitute up to 4% w/w of peanuts and are a unique source of A-type procyanidins. Methanol extract of the skins was purified by Centrifugal Partition Chromatography (FCPC Kromaton, Roussel Robatel; France) and RP HPLC to afford pure procyanidins. They contain both epicatechin (EC) and catechin (C) subunits, which are joined through 4β–8 or 4α–6 bonds. The extract contai... READ MORE

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