Abstract
The mass spectral fragmentation behaviour of some labda-7,14-dien-13(R)-ol monoglycosides has been studied. Mass spectra of O-isopropylidine derivatives of the glycosides have been determined to distinguish the isomeric sugar moieties containing rhamnopyranose, fucopyranose and 6-deoxyidopyranose, respectively. The main fragment ions of the sugar moieties were investigated with the aid of deuterium labelling and high resolution mass measurement.
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