Neutral Anthraquinones and Anthraquinone Carboxylic Acids

Chromatographic analysis of the distribution of neutral anthraquinones and anthraquinone carboxylic acids particularly in Dermocybe 

Questin (291) Dermocybe crocea =D. cinnamomeolutea) [1.4x10 %] 657), 629), D. semisanguinea 87) 

Emodin-6,8-di-0-methyl ether (292) Cortinarius armillatus 96), C. elegantior 387, 617), C.flaves-centium 371), C. mallochii 405), C. orichalceus [c] 338, 388), C. rufoolivaceus 252, 617), C. xanthophyllus 371), Dermocybe semisanguinea (87) 

Erythroglaucin (295) Cortinarius elegantior 387, 617), Dermocybe canaria 404), D. cinnabarina [lx 10 %] 621), D. semisanguinea [trace] 616) 

During their work, Kogl and Postowsky 432) isolated emodin (288) together with a second pigment which they named dermocybin. Structural studies by Birkinshaw 102) established dermocybin as either the 6- or 7-O-methyl ether of l,5,6,7,8-pentahydroxy-3-methyl-9,10-anthraquinone ( nordermocybin ) which was synthesised, thus establishing the oxygenation pattern in dermocybin itself. 

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