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Chemistry of Australian Lichens. I. Some Constituents of Parmelia conspersa (Ehrh.) Ach., Ramalina fraxinea (L.) Ach., Usnea barbata (L
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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.
Title: Chemistry of Australian Lichens. I. Some Constituents of
Parmelia conspersa
(Ehrh.) Ach.,
Ramalina fraxinea
(L.) Ach.,
Usnea barbata
(L
Description:
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.
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