Pseudodepsidones and other constituents from Xanthoparmelia scabrosa
1979; Elsevier BV; Volume: 18; Issue: 12 Linguagem: Inglês
10.1016/s0031-9422(00)82715-6
ISSN1873-3700
Autores Tópico(s)Botany and Plant Ecology Studies
ResumoThe structural assignment of a new lichen constituent, loxodinol isolated from X. scabrosa, is described. Other constituents present were loxodin, norlobaridone, usnic acid and a pseudodepsidone norlabariol. The major sugar was mannitol, while the most abundant α-amino acids were aspartic and glutamic acids. A number of X. scabrosa samples from widely different geographical regions were screened and the presence or absence of loxodinol and norlobariol was successfully employed to distinguish between X. scabrosa and X. mexicana.
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