Results 141 to 150 of about 829 (182)

Phytoecdysteroids ofRhaponticum carthamoides

Chemistry of Natural Compounds, 1987
From the roots with rhizomes of the plantRhaponticum carthamoides Willd) Iljin Compositae), in addition to integristerone A, ecdysterone, polypodin B, 2-deoxyecdysterone, and 24(28)-dehydromakisterone A, we have isolated the new compounds ecdysteron3–2,3-monoacetonide (I), ecdysterone 20,22-monoacetonide (II)) and rhapisterone (III): I — C30H48O7, mp ...
U. A. Bastaev, N. K. Abubakirov
openaire   +1 more source

A new phytoecdysteroid

Russian Chemical Bulletin, 2000
A new phytoecdysteroid,viz, 2-deoxy-3-epi-4β, 20-dihydroxycedysone ((20R,22R)-3α,4β 14α,20,22,25-hexahydroxy-5β-cholest-7-en-6-one), named coronatasteronc, was isolated fromSerratula coronata and identified by NMR spectroscopy.
V. N. Odinokov, I. V. Galyautdinov, A. A. Fatykhov, L. M. Khalilov   +3 more
openaire   +1 more source

Phytoecdysteroids: biological aspects

Phytochemistry, 2001
Phytoecdysteroids are a family of about 200 plant steroids related in structure to the invertebrate steroid hormone 20-hydroxyecdysone. Typically, they are C27, C28 or C29 compounds possessing a 14alpha-hydroxy-7-en-6-one chromophore and A/B-cis ring fusion (5beta-H).
openaire   +3 more sources

Phytoecdysteroids ofDiploclisia glaucescensSeed

Planta Medica, 1985
Five phytoecdysteroids were isolated from the seeds of DIPLOCLISIA GLAUCESCENS and identified by spectrometric methods ( (1)H-NMR, (13)C-NMR and CIMS). One of them, 24- EPI- makisterone A, has not been reported before. The other four - 20-hydroxyecdysone, makisterone A, 24(28)-dehydromakisterone A and pterosterone - were known previously. The (13)C-NMR
R W, Miller, J, Clardy, J, Kozlowski, K L, Mikolajczak, R D, Plattner, R G, Powell, C R, Smith, D, Weisleder, Z, Qi-Tai   +8 more
openaire   +3 more sources

Phytoecdysteroids in the genus Asparagus (Asparagaceae)

Phytochemistry, 2001
Phytoecdysteroids, plant steroids which are analogues of invertebrate steroid hormones, probably contribute to the deterrence of phytophagous invertebrate predators. They also seem to possess antimicrobial activity and several pharmaceutical and medicinal benefits have been ascribed to them. Here. we present a survey of seeds of 16 species of the genus
L, Dinan, T, Savchenko, P, Whiting
openaire   +2 more sources

Chromatographic procedures for phytoecdysteroids

Journal of Chromatography A, 1994
Abstract The complexity of the mixtures of ecdysteroids in plants and the close similarities in their chemical structures have challenged chemists to find suitable ways to separate and identify them. Great ingenuity has been applied to these problems and consequently a wide range of separation and methods are available today.
R. Lafont, E.D. Morgan, I.D. Wilson
openaire   +1 more source

Phytoecdysteroids and glycoceramides from Eriophyton wallchii

Steroids, 2004
Two new compounds, 28-epi-cyasterone and eriophytonoide, along with 11 known compounds, cyasterone, ajuforrestins A and B, 20-hydroxyecdysone, polypodin B, ajugalactone, 8-O-acetylharpagid, apigenin, N-[2hydroxy-(nonadecanoyl-tricosanoyl)]-4-hydroxy-trans-8-sphingenine, beta-sitosterol, and daucosterol, were isolated from the aqueous ethanolic extract ...
Jinhai, Yi, Yinggang, Luo, Bogang, Li, Guolin, Zhang   +3 more
openaire   +2 more sources

Complex phytoecdysteroid cocktail of Silene otites (Caryophyllaceae)

Archives of Insect Biochemistry and Physiology, 1999
Several new minor ecdysteroids from Silene otites (Caryophyllaceae) have been purified and identified. This plant species had previously been shown to contain a complex ecdysteroid cocktail, with 20-hydroxyecdysone as the major component, and significant amounts of 2-deoxyecdysone, 2-deoxy-20-hydro-xyecdysone, and 20-hydroxyecdysone 22-acetate, and a ...
M. B�thori, J.-P. Girault, H. Kalasz, I. Math�, L.N. Dinan, R. Lafont   +5 more
openaire   +1 more source

Phytoecdysteroids of Silene viridiflora

Chemistry of Natural Compounds, 2003
The known ecdysteroids polipodin B, 2-deoxyecdysterone, ecdysterone, 26-hydroxypolipodin B, integristerone A, and sileneosides A and D were observed in the aerial part of Silene viridiflora L. (Caryophyllaceae). 26-Hydroxypolipodin B was observed in this species for the first time.
N. Z. Mamadalieva, L. N. Zibareva, Z. Saatov, R. Lafont   +3 more
openaire   +1 more source

Distribution of phytoecdysteroids in the Caryophyllaceae

Phytochemistry, 2003
Certain genera within the Caryophyllaceae (especially Silene and Lychnis) have received a significant amount of attention with regard to the isolation and identification of ecdysteroids. However, the taxonomy of this family is difficult. Hence, the occurrence of phytoecdysteroids in members of the Caryophyllaceae is presented, and combined with new ...
Larisa, Zibareva, Vladimir, Volodin, Zyadilla, Saatov, Tamara, Savchenko, Pensri, Whiting, René, Lafont, Laurence, Dinan   +6 more
openaire   +2 more sources