Results 151 to 160 of about 1,602 (196)
Some of the next articles are maybe not open access.
Two alkaloids from Zephyranthes carinata
Phytochemistry, 1998Abstract Two new Amaryllidaceae alkaloids, 1- O -(3-hydroxybutyryl) pancratistanin and 1-O-(3-O-β- d -glucopyranosylbutyryl) pancratistatin, were isolated from the bulbs of Zephyranthes carinata . The structures of the two alkaloids were established by comprehensive spectral analysis.
Keisuke Kojima +3 more
openaire +1 more source
Two new ceramides from Zephyranthes candida
Chemistry of Natural Compounds, 2009Two new ceramides were isolated from the bulbs of Zephyranthes candida. Their structures were established as (2S,3S,4R,13E)-1,3,4-trihydroxy-2-[(2′R)-2′-hydroxytetracosanoylamino]-13-octadecene, named zephyranamide A (1) and (2S,3S,4R)-1,3,4-trihydroxy-2-octacosanoylaminohexadecene, named zephyranamide B (2).
Zhiping Wu +5 more
openaire +1 more source
(+)-Epimaritidine, an alkaloid from Zephyranthes rosea
Phytochemistry, 1985Abstract The isolation and determination, by spectroscopic analyses and chemical correlation, of the structure and stereochemistry of (+)-epimaritidine, a new alkaloid from Zephyranthes rosea , is reported. A facile transformation of maritidine to (+)-epimaritidine is described and the mechanism is appraised in the light of the thermodynamic ...
Shibnath Ghosal +2 more
openaire +1 more source
Crinane and Lycorane Type Alkaloids from Zephyranthes citrina
Planta Medica, 2001Eight alkaloids have been isolated from Zephyranthes citrina (Amaryllidaceae). The alkaloid oxomaritidine is reported here for the first time from a natural source. The structure and stereochemistry of the alkaloids were determined by physical and spectroscopic methods.
M R, Herrera +5 more
openaire +2 more sources
ChemInform Abstract: Two Alkaloids from Zephyranthes carinata.
ChemInform, 1998AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
K. KOJIMA +3 more
openaire +1 more source
2013
Abstract In the present thesis, a phytochemical study of three plants from the flora of Brazil was carried out. The study was performed by the isolation and, subsequently, the structural identification of some of the containing alkaloids. The selected plants were the Hippeastrum aulicum, the Hippeastum vittatum and the Zephyranthes gracilifolia Baker ...
openaire +1 more source
Abstract In the present thesis, a phytochemical study of three plants from the flora of Brazil was carried out. The study was performed by the isolation and, subsequently, the structural identification of some of the containing alkaloids. The selected plants were the Hippeastrum aulicum, the Hippeastum vittatum and the Zephyranthes gracilifolia Baker ...
openaire +1 more source
APOMIXIS IN ZEPHYRANTHES TEXANA HERB.
American Journal of Botany, 1951ZEPHYRANTHES TEXANA Herb. is a species of the subtribe Zephyranthinae of the Amaryllidaceae. In its range it is restricted to the southeastern quarter of Texas where it is known as a yellow rain-lily. It is the same species in which Pace (1913) reported apomixis. At that time it was called Atamosco texana but Zephyranthes Herb.
openaire +1 more source
The Breeding System of Zephyranthes atamasco (Amaryllidaceae)
Bulletin of the Torrey Botanical Club, 1991mean ? standard deviation) as those from cross-pollinations (24.7 ? 14.0). Germination was slightly lower for seeds produced from self-pollinations (62.3 ? 36.1%) as compared with seeds from cross-pollinations (77.7 ? 22.9%). Self- and cross-pollinations resulted in fruits with significantly more seeds than open-pollinations (13.4 ? 7.3).
Steven B. Broyles, Robert Wyatt
openaire +1 more source
Flavans with potential anti-inflammatory activities from Zephyranthes candida
Bioorganic & Medicinal Chemistry Letters, 2016Three new flavans, (2R,3R)-7-methoxy-flavan-3-ol (1), (2S)-7,3'-dihydroxy-4'-methoxyflavan 3'-O-β-d-glucopyranoside (2), (2S)-7,3'-dihydroxy-4'-methoxyflavan 7-O-β-d-glucopyranoside (3), and one known flavan (4) were isolated from the whole plants of Zephyranthes candida (Amaryllidacea).
Guanqun, Zhan +5 more
openaire +2 more sources
Cytotoxic and anti-inflammatory active plicamine alkaloids from Zephyranthes grandiflora
Fitoterapia, 2018Phytochemical investigation on the 95% EtOH extract of the whole plants of Zephyranthes grandiflora resulted in the isolation of six new 4a-epi-plicamine-type alkaloids, zephygranditines A-F (1-6), including three novel 11,12-seco-plicamine-type alkaloids.
Hong-Yong, Wang +3 more
openaire +2 more sources