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Usnea meridensis

Chem Unserer Zeit 16 71-88 II. ibid. 16 116-123 Keogh MF (1976) 2 -0-Demethylpsoromic acid from Us-nea sp. Phytochemistry 15 1801 Keogh MF (1977) Malonprotocetraric acid from Parm-otrema conformatum. Phytochemistry 16 1102 Keogh MF (1978) New P-orcinol depsidones from Xanthoparmelia quintaria and a Thelotrema species. Phytochemistry 17 1192-1193 Keogh MF, Duran I (1977) A new fatty acid from Usnea meridensis. Phytochemistry 16 1605-1606 Keogh MF, Zurita ME (1977) a-(15-Hydroxyhexadecyl) itaconic acid from Usnea aliphatica. Phytochemistry 16 134-135... [Pg.463]

A homologous aliphatic acid, methyl 3,4-dicarboxy-3-hydroxy-19-oxoeicosanoate (43), has been isolated from Usnea meridensis 210). The structure of this compound followed from the spectroscopic and chemical properties, by comparison with the properties of caperatic acid (41) and by sodium bismuthate oxidation to methyl 3,19-dioxoeicosanoate (44) 210). Caperatic acid (41) and methyl 3,4-dicarboxy-3-hydroxy-19-oxoeico-sanoate (43) have similar optical rotations but the absolute configuration of these acids remains to be determined. [Pg.115]

See other pages where Usnea meridensis is mentioned: [Pg.712]    [Pg.147]    [Pg.228]    [Pg.712]    [Pg.147]    [Pg.228]   
See also in sourсe #XX -- [ Pg.115 ]



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