Lobaria retigera retigeranic acid from

Sesterterp. retigeranic acid-like retigeranic acid (Lobaria retigera (Bory) Trevis), 1869, Eumyc. from India Turner 1983) stellatic acid-like Aspergillus stellatus (Curzi) 1934, Eumyc. from Pakistan Turner 1983). 

Kaneda M, Takahashi R, litaka Y, Shibata S (1972) Retigeranic acid, a novel sesterterpene isolated from the lichens of Lobaria retigera group. Tetrahedron Lett 4609-4611... 

Retigeranic acid (480), isolated from the Lobaria retigera and related species, is the first example of a lichen sesterterpene. As sufficient information could not be obtained from routine spectral data 205), the structure (and absolute configuration) of (480) was determined by X-ray diffraction of the / -bromoanilide derivative of retigeranic acid 204). A possible biosynthetic route to (480) has also been outlined 205). 

Retigeranic acid, a sesterterpenoid from the lichen Lobaria retigera, was separated by HPLC into two stereoisomers, retigeranic acid A (551) and retigeranic acid B (552) the structures of both components were determined by X-ray analysis (675). 

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See also in sourсe #XX -- [ , ]

See also in sourсe #XX -- [ , ]

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