Parmelia damaziana

JA Elix, VK Jayanthi, CC Leznoff. 2,4-Di-O-methylgyrophoric acid and 2,4,5-tri-O-methylhiascic acid. New tridepsides from Parmelia damaziana. Austral J Chem 34 1757-1761, 1981. 

Well established techniques 170, 171) for the isolation and separation of depsides from mixtures of lichen acids include fractional crystallization, preparative layer chromatography and column chromatography. Vacuum liquid chromatography 124) provided a convenient and efficient modification of the latter technique and was used in separating a complex mixture of tridepsides from the crude extracts of Parmelia damaziana. 

Di-O- methylgyrophoric acid OMe H OMe H OH CO2H OH Parmelia damaziana Vacuum liquid chromatography Spectral data, synthesis 124)... 

Elix, J. A., V. K. Jayanthi, and C. C. Leznoff 2,4-Di-O-methylgyrophoric Acid and 2,4,5-Tri-O-methylhiascic Acid. New Tridepsides from Parmelia damaziana. Austral. J. Chem. 34, 1757 (1981). 

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