Quinones of Cetraria islandica

Two known quinones, 3-ethyl-2,7-dihydroxynaphthazarin and 6,6′-bis(3-ethyl-2,7-dihydroxy-naphthazarin) and one new quinone, 2- O-(3′-ethyl-1′,2′,3′,4′-tetrahydro-5′,7′,8′-trihydroxy-1′,2′,4′-triketo-3′-naphthyl)-3-ethyl-7- hydroxynaphthazarin, were isolated from the red thallus tips of the lichen Ce...

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Bibliographic Details
Published in:Phytochemistry (Oxford) 1997-10, Vol.46 (3), p.565-568
Main Authors: Stepanenko, L.S., Krivoshchekova, O.E., Dmitrenok, P.S., Maximov, O.B.
Format: Article
Language:English
Subjects:
anatomy and morphology
Cetraria
chemical composition
chemical structure
nuclear magnetic resonance spectroscopy
pigments
quinones
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Description
Summary:Two known quinones, 3-ethyl-2,7-dihydroxynaphthazarin and 6,6′-bis(3-ethyl-2,7-dihydroxy-naphthazarin) and one new quinone, 2- O-(3′-ethyl-1′,2′,3′,4′-tetrahydro-5′,7′,8′-trihydroxy-1′,2′,4′-triketo-3′-naphthyl)-3-ethyl-7- hydroxynaphthazarin, were isolated from the red thallus tips of the lichen Cetraria islandica var. polaris.
ISSN:0031-9422
1873-3700
DOI:10.1016/S0031-9422(97)00321-X