Hirtusneanoside, a new O-deoxyglycoside of a dimeric tetrahydroxanthone, was isolated from the lichen Usnea hirta. Its structure, including the absolute configuration, was determined by means of extensive spectroscopic data (UV, IR, MS, CD, 1D and 2D NMR) and chemical degradation. Hirtusneanoside has a unique structure comprising L-rhamnopyranoside of a tetrahydroxanthone dimer and showed growth inhibitory activities against Gram-positive bacteria.

Institute of Microbiology Prague Czech Republic

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$a Hirtusneanoside, an unsymmetrical dimeric tetrahydroxanthone from the lichen Usnea hirta / $c T Rezanka, K Sigler

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$a Institute of Microbiology, Prague, Czech Republic. rezanka@biomed.cas.cz

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$a Hirtusneanoside, a new O-deoxyglycoside of a dimeric tetrahydroxanthone, was isolated from the lichen Usnea hirta. Its structure, including the absolute configuration, was determined by means of extensive spectroscopic data (UV, IR, MS, CD, 1D and 2D NMR) and chemical degradation. Hirtusneanoside has a unique structure comprising L-rhamnopyranoside of a tetrahydroxanthone dimer and showed growth inhibitory activities against Gram-positive bacteria.

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$a antibakteriální látky $x farmakologie $x chemie $x izolace a purifikace $7 D000900

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