Electron impact fragmentation of pyranocoumarin derivatives. Tandem mass spectrometric study of abundant singly and doubly charged fragment ions at high and low collision energy

Abstract

AbstractA series of novel pyranocoumarin derivatives were analysed by electron impact mass spectrometry and tandem mass spectrometry at low aud high collision energy. The collision‐induced decomposition tandem mass spectra of the [M  CH3]+ ions yielded several structurally valuable fragments and those of the [M  CH3]2+ ions allowed some charge‐separation reactions to be recognized.