Rhizoplaca chrysoleuca

CivHjoOu, Mr 376.36, pale yellowish platelets, mp. 156- I58°C, [oId -231°, that change to yellow with KOH. An iso- usnic acid derivative from one chemo-variety of the lichen Rhizoplaca chrysoleuca. 

Connolly JD, Freer AA, Huneck S (1984a) Crystal structure of (-)-placodiolic acid, a dibenzofuran derivative from the hchen Rhizoplaca chrysoleuca. Phytochemistry 23 702... 

Huneck S, Akinniyi JA, Cameron AF, Connolly JD, MulhoUand AG (1981) The absolute configurations of (+)-usnic and (+)-isousnic acids. X-Ray analyses of the (-)-a-phenyl-ethylamine derivative of (+)-usnic acid and of (-)-pseudoplacodiolic acid, a new dibenzofuran from the lichen Rhizoplaca chrysoleuca. Tetrahedron Lett 22 351-352... 

Zhou OM, Guo SY, Huang MR et al (2006) A study of the genetic variability of Rhizoplaca chrysoleuca using DNA sequences and secondary metabolic substances. Mycologia 98 57-67... 

Chemistry of some Yellow Acarospora Species. Lichenologist 12, 239 (1980). Huneck, S., J. A. Akinniyi, A. F. Cameron, J. D. Connolly, and A. G. Mulholland The Absolute Configurations of ( + )-Usnic and ( + )-Isousnic Acid. X-Ray Analyses of the (— )-a-Phenylethylamine Derivative of ( + )-Usnic Acid and of ( —)-Pseudo-placodiolic Acid, A New Dibenzofuran, from the Lichen Rhizoplaca chrysoleuca. Tetrahedron Letters 22, 351 (1981). 

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