Glycoside esters from lichens of central Asia.
Ten compounds isolated from the extract of the central Asian lichens comprised new glycosides and glycoside esters having 18R-hydroxy-dihydroalloprotolichesterinic, 18S-hydroxy-dihydroprotolichesterinic and 18S-hydroxy-neodihydroprotolichesterinic acids, as the aglycones and a saccharide moiety linked at C-18 and also at C-21 made by glucose, xylose or rhamnose. The structures were elucidated using extensive spectroscopic analysis (1D and 2D NMR, MS, IR, UV and ORD) and by biochemical methods.
Rezanka
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Institute of Microbiology, Vídenská 1083, 14220, Prague, Czech Republic. rezanka@biomed.cas.cz
Guschina
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IA
D004952:Esters / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D008011:Lichens / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry*; D013057:Spectrum Analysis
D004952:Esters; D006027:Glycosides; D010936:Plant Extracts