The tetrahydroanthraquinones (1S,3S)-austrocortirubin (7) and (1S,3S)-austrocortilutein (10) and the anthraquinones austrocortinin (13), xanthorin (14) and 3-methylxanthopurpurin 6-O-methyl ether (15) occur in the fungus Dermocybe splendida mainly in the form of their respective 8-O-β-D-gentiobiosides (26), (11), (16), (19) and (22) (gentiobiose = 6-O-β-D-glucopyranosyl-β-D-glucopyranose). The various gentiobiosides are isolated from lyophilized fruit bodies, separated by chromatography and characterized, in the main, as their acetyl derivatives by spectroscopic and chemical methods. A method for the selective cleavage of phenolic acetyl groups in peracetylated anthraquinone and tetrahydroanthraquinone glycosides is described.
fungi, pigments, anthraquinones, tetrahydroanthraquinones, gentiobiosides, Dermocybe
Publication DOI: 10.1071/CH99176Journal NLM ID: 0370614Institutions: School of Chemistry, The University of Melbourne, Parkville, Australia
Methods: 13C NMR, 1H NMR, EI-MS, IR, FAB-MS, TLC, acid hydrolysis, UV, extraction, optical rotation measurement, acetylation, elemental analysis, CC, melting point determination, evaporation, PTLC
Found