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6 rezultatus
Validated method for the analysis of frangulins A and B and glucofrangulins A and B using HPLC and UHPLC.
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In the present study, robust and validated HPLC and UHPLC methods for the quantitative determination of frangulins A and B (3 and 4) and glucofrangulins A and B (1 and 2) in the bark of Frangula alnus have been developed. The HPLC method allowed the separation of the analytes in 25 min and the UHPLC
[Synthesis and definitive structural analysis of frangulin and glucofrangulin from Rhamus frangula L].
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[Anthraquinones and anthraquinone glycosides. 19. Synthesis of alpha and beta frangulin and frangula-emodin-9-anthron-10-C-glycoside].
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[Investigations of the anthrachinone-glycosides from Rhamnus frangula L. 3. 6-O (D-apiofuranosyl)-1,6,8-trihydroxy-3-methyl-anthrachinone, a new glycoside (frangulin B) from the bark of Rhamnus frangula L (author's transl)].
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Two-dimensional qNMR of anthraquinones in Frangula alnus (Rhamnus frangula) using surrogate standards and delay time adaption.
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In the absence of adequate reference material, a problem often encountered in natural product chemistry, we investigated the use of surrogate standards in two-dimensional qNMR for the quantification of anthraquinones in the bark of alder buckthorn (Frangula alnus). Using the integrals of cross
Induction of defence mechanisms in grapevine leaves by emodin- and anthraquinone-rich plant extracts and their conferred resistance to downy mildew.
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The ability of two plant extracts, Rheum palmatum root extract (RPRE) and Frangula alnus bark extract (FABE), to protect Vitis vinifera leaves from Plasmopara viticola infection was evaluated. These natural products are toxic to the pathogen and induce defence reactions in a susceptible cultivar of
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