AtranorinCHAPTER XVI. Lichens, Lichen acids, and Colouring Matters Derived Therefrom.(Osa artikkelista)

The Natural Organic Colouring Matters
By
Arthur George Perkin, F.R.S., F.R.S.E., F.I.C., professor of colour chemistry and dyeing in the University of Leeds
and
Arthur Ernest Everest, D.Sc., Ph.D., F.I.C., of the Wilton Research Laboratories; Late head of the Department of Coal-tar Colour Chemistry; Technical College, Huddersfield
Longmans, Green and Co.
39 Paternoster Row, London
Fourth Avenue & 30th Street, New York
Bombay, Calcutta, and Madras
1918

Kaikki kuvat (kemialliset kaavat) puuttuvat // None of the illustrations (of chemical formulas) included.

Atranorin, C₁₉H₁₈O₈, is present in the lichens Evernia vulpina, E. prunastri, E.furfuracea, Lecanora atra, L. sordida, Parmelia perlata, P. physodes, P. tinctorium, Physcia stellaris, Xanthoria parietina, Cladonia rangiformis, Stereocaulan vesuvianum and others. It forms colourless prisms, melting-point 195-197° C. (Zopf), 187-188°C. (Hesse), easily soluble in hot chloroform, soluble in alkalis with a yellow colour.

According to Paternò, by heating with water to 150°, atranorin gives physciol (methyl-phloroglucinol) and atraric acid (betorcinolcarboxylic acid methyl ester), and these substances are also obtained when atranorin is heated with acetic acid in a sealed tube (Hesse).

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