TY - JOUR A1 - Briner, GP A1 - Gream, GE A1 - Riggs, NV T1 - Chemistry of Australian Lichens. I. Some Constituents of Parmelia conspersa (Ehrh.) Ach., Ramalina fraxinea (L.) Ach., Usnea barbata (L.) Wigg., and U. ceratina Ach., from the New England Region JF - Australian Journal of Chemistry JO - Aust. J. Chem. Y1 - 1960 VL - 13 IS - 2 SP - 277 EP - 284 KW - UR - https://doi.org/10.1071/CH9600277 N2 - Each of the species named in the title has yielded (+)-usnic acid, as found in previous investigations in other parts of the world. Other aromatic constituents isolated, except salazinic acid from Parmelia conspersa differ from those previously reported and include a new compound from P. conspersa. It is suggested that usnaric acid, previously obtained from Usnea spp. but unidentified, was a mixture of salazinic and norstictic acids. D-Mannitol or D-arabitol has been isolated from the water-soluble fractions. ER -