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Lichen substances—128 Mass spectroscopy of natural products—12 . Comparative positive and negative ion mass spectroscopy of nitrogen‐containing and ring C cleaved usnic acid derivatives
Author(s) -
Schmidt J.,
Huneck S.,
Franke P.
Publication year - 1981
Publication title -
biomedical mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0306-042X
DOI - 10.1002/bms.1200080703
Subject(s) - usnic acid , fragmentation (computing) , mass spectrum , chemistry , ring (chemistry) , mass spectrometry , nitrogen , spectroscopy , ion , lichen , organic chemistry , physics , chromatography , biology , botany , quantum mechanics , ecology
The mass spectral fragmentation behaviour of some nitrogen‐containing and ring C cleaved usnic acid derivatives has been studied. The principal fragmentation pathway is drastically changed in the nitrogen‐containing compounds when compared to that observed with the ring C cleaved derivatives. The main fragment ions of the ring C derivatives are also present in the mass spectrum of usnic acid itself.