Ms. Buchanan et al., PIGMENTS OF FUNGI - XLVI - NEW DIMERIC DIHYDROANTHRACENONES OF THE FLAVOMANNIN TYPE FROM AN AUSTRALIAN TOADSTOOL OF THE GENUS DERMOCYBE, Australian Journal of Chemistry, 51(2), 1998, pp. 103-109
cis, cis-4,4'-Dihydroxyflavomannin 6,6'-di-O-methyl ether A (4), 10,10
'-dihydroxy-4,4'-dioxoflavomannin 6,6'-di-O-methyl ether A (B) and 0-d
ihydroxy-4-oxoanhydroflavomannin-9',10'-quinone 6,6'-di-O-methyl ether
A (7), new coupled dihydroanthracenones, and bierythroglaucin (8), a
novel dimeric anthraquinone, have been isolated along with emodin (9)
and citreorosein (omega-hydroxyemodin) (10) from the purple-brown frui
t bodies of the Australian Dermocybe sp. WAT 21566. The structures and
relative stereochemistry of the new natural products (4) and (6)-(8)
are deduced by spectroscopic and chemical methods.