FAST-ATOM-BOMBARDMENT MASS-SPECTRA OF PHLOROGLUCINOLS FROM DRYOPTERISFERNS

Fast-atom-bombardment mass spectra of ten phloroglucinol derivatives c ontaining two to six ring units were recorded. The mass spectral behav ior of the compounds was quite similar under these conditions. Molecul ar-weight information was readily available as well as sequential stru ctural data due to extensive fragmentation. Sequential alterations due to the rottlerone change or other analogous decomposition reactions p roved to be almost lacking in fast-atom-bombardment mass spectrometry. The negative-ion spectra in general showed better signal-to-noise rat ios and more distinct fragment ions.