5289-74-7Relevant articles and documents
A furostanol saponin and phytoecdysteroid from roots of Helleborus orientalis
Akin, Sebahat,Anil, Huseyin
, p. 90 - 92 (2007)
A furostanol saponin mixture and a known phytoecdysteroid were isolated from the roots of Helleborus orientalis Lam. Their structures were established as 26-[(β-D-glucopyranosyl)oxy]-22α-hidroxyfurosta-5,25(27)-dien- 1β,3β,11α-triol (1a), 26-[(β-D-glucopyranosyl)oxy]- 22α-methoxyfurosta-5,25(27)-dien-1β,3β,11α-triol (1b), and 20-hydroxy-β-ecdyson-3-O-β-D-glycoside (2). Acid hydrolysis of 1a,b gave (1β,3β,11α,22α)-22,26-dimethoxyfurosta-5,25(27)-dien- 1,3,11-triol (aglycone 1) and of 2 gave 20-hydroxy-β-ecdyson (aglycone 2). Their structures were elucidated by spectral analysis. Springer Science+Business Media, Inc. 2007.
Ecdysone 20-monooxygenase, a cytochrome P450 enzyme from spinach, Spinacia oleracea
Grebenok, Robert J.,Galbraith, David W.,Benveniste, Irene,Feyereisen, Rene
, p. 927 - 933 (1996)
A microsomal preparation isolated from first leaves of 25-day-old spinach catalysed the hydroxylation of ecdysone to produce the insect moulting hormone, 20-hydroxyecdysone. Hydroxylation was dependent on NADPH and molecular oxygen, and was inhibited by carbon monoxide. Carbon monoxide inhibition was partially reversible by white light. Polyclonal antibodies to the Jerusalem artichoke NADPH-cytochrome P450 reductase inhibited the hydroxylation reaction as well as the spinach microsomal NADPH cytochrome c reductase. These results taken together establish ecdysone hydroxylation as a cytochrome P450 dependent reaction in spinach, which is known to synthesize large amounts of phytoecdysteroids.
A PHYTOECDYSTEROID, TAXISTERONE, FROM TAXUS CUSPIDATA
Nakano, Kimiko,Nohara, Toshihiro,Tomimatsu, Toshiaki,Nishikawa, Masaru
, p. 2749 - 2751 (1982)
A new phytoecdysteroid, taxisterone, was isolated from Taxus cuspidata and the structure was deduced to be 22-deoxyecdysterone by spectral data. - Key Word Index: Taxus cuspidata; Taxaceae; phytoecdysteroid; taxisterone; 22-deoxyecdysterone.
ECDYSTEROID ANALOGUES HAVING PLANT GROWTH PROMOTING ACTIVITY
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Page/Page column 25, (2012/05/05)
The present disclosure relates to ecdysteroid analogues which have similar, identical, or enhanced biological activities as compared to brassinosteroids, for instance similar, identical, or enhanced plant growth promoting activity. The ecdysteroid analogues can have similar structures to particular brassinosteroids. Mixtures of ecdysteroid analogues, the mixture having similar, identical, or enhanced biological activities as compared to brassinosteroids, for instance similar, identical, or enhanced plant growth promoting activity, are also provided by the present disclosure.